func chooseNum(x: Int, y: Int) -> Int {
    var x = x
    var y = y
    if x > y {
        x = y.swap(&x)
    }
    for i in x...y {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

func chooseNum(x: Int, y: Int) -> Int {
    var x = x
    var y = y
    if x > y {
        x = y.swap(&x)
    }
    for i in x...y {
        if i % 2 == 1 {
            return i
        }
    }
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var x = x
    var y = y
    if x > y {
        x = y.swap(&x)
    }
    for i in x...y {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

// This function takes two positive numbers x and y and returns the
// biggest odd integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 13
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var x = x
    var y = y
    if x > y {
        x = y.swap(&x)
    }
    for i in x...y {
        if i % 2 == 1 {
            return i
        }
    }
    return -1
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var x = x
    var y = y
    var result = -1
    
    if x > y {
        x = y.swap(&x)
    }
    
    while x <= y {
        if x % 2 == 0 {
            result = x
            break
        }
        x += 1
    }
    
    return result
}

func chooseNum(x: Int) -> Int {
    var x = x
    var result = -1
    
    while x > 0 {
        if x % 2 == 0 {
            result = x
            break
        }
        x -= 1
    }
    
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var x = x
    var y = y
    var result = -1
    
    if x > y {
        x = y.swap(&x)
    }
    
    while x <= y {
        if x % 2 == 0 {
            result = x
            break
        }
        x += 1
    }
    
    return result
}

// This function takes a positive integer number and returns the
// biggest even integer number that is in the range [1, number] inclusive.
// For example:
// chooseNum(x: 12) == 12
// chooseNum(x: 13) == 14
func chooseNum(x: Int) -> Int {
    var x = x
    var result = -1
    
    while x > 0 {
        if x % 2 == 0 {
            result = x
            break
        }
        x -= 1
    }
    
    return result
}

// This function takes a positive integer number and returns the
// biggest even integer number that is in the range [1, number] inclusive.
// For example:
// chooseNum(x: 12) == 12
// chooseNum(x: 13) == 14
func chooseNum(x: Int) -> Int {
    var x = x
    var result = -1
    
    while x > 0 {
        if x % 2 == 0 {
            result = x
            break
        }
        x -= 1
    }
    
    return result
}

// This function takes a positive integer number and returns the
// biggest even integer number that is in the range [1, number] inclusive.
// For example:
// chooseNum(x: 12) == 12
// chooseNum(x: 13) == 14
func chooseNum(x: Int) -> Int {
    var x = x
    var result = -1
    
    while x > 0 {
        if x % 2 == 0 {
            result = x
            break
        }
        x -= 1
    }
    
    return result
}

// This function takes a positive integer number and returns the
// biggest even integer number that is in the range [1, number] inclusive.
// For example:
// chooseNum(x: 12) == 12
// chooseNum(x: 13) == 14
func chooseNum(x: Int) -> Int {
    var x = x
    var result = -1
    
    while x > 0 {
        if x % 2 == 0 {
            result = x
            break
        }
        x -= 1
    }
    
    return result
}

// This function takes a positive integer number and returns the
// biggest even integer number that is in the range [1, number] inclusive.
// For example:
// chooseNum(x: 12) == 12
// chooseNum(x: 13) == 14
func chooseNum(x: Int) -> Int {
    var x = x
    var result = -1
    
    while x > 0 {
        if x % 2 == 0 {
            result = x
            break
        }
        x -= 1
    }
    
    return result
}

// This function takes a positive integer number and returns the
// biggest even integer number that is in the range [1, number] inclusive.
// For example:
// chooseNum(x: 12) == 12
// chooseNum(x: 13) == 14
func chooseNum(x: Int) -> Int {
    var x = x
    var result = -1
    
    while x > 0 {
        if x % 2 == 0 {
            result = x
            break
        }
        x -= 1
    }
    
    return result
}

// This function takes a positive integer number and returns the
// biggest even integer number that is in the range [1, number] inclusive.
// For example:
// chooseNum(x: 12) == 12
// chooseNum(x: 13) == 14
func chooseNum(x: Int) -> Int {
    var x = x
    var result = -1
    
    while x > 0 {

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var x = x
    var y = y
    if x > y {
        x = y.swap(&x)
    }
    var result = -1
    while x <= y {
        if x % 2 == 0 {
            result = x
            break
        }
        x += 1
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var x = x
    var y = y
    if x > y {
        x = y.swap(&x)
    }
    var result = -1
    while x <= y {
        if x % 2 == 0 {
            result = x
            break
        }
        x += 1
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

func zeros(n: Int) -> Int {
    var result = 0
    var n = n
    while n > 0 {
        if n % 10 == 0 {
            result += 1
        }
        n /= 10
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

// This function takes a positive integer number n and returns the
// number of zeros at the end of the decimal representation of n.
// For example:
// zeros(n: 10) == 1
// zeros(n: 100) == 2
// zeros(n: 1000) == 3
func zeros(n: Int) -> Int {
    var result = 0
    var n = n
    while n > 0 {
        if n % 10 == 0 {
            result += 1
        }
        n /= 10
    }
    return result
}

// This function takes a positive integer number n and returns the
// number of zeros at the beginning of the decimal representation of n.
// For example:
// zeros(n: 10) == 1
// zeros(n: 100) == 2
// zeros(n: 1000) == 3
func zeros(n: Int) -> Int {
    var result = 0
    var n = n
    while n > 0 {
        if n % 10 == 0 {
            result += 1
        }
        n /= 10
    }
    return result
}

// This function takes a positive integer number n and returns the
// number of zeros at the beginning and at the end of the decimal
// representation of n.
// For example:
// zeros(n: 10) == 1
// zeros(n: 100) == 2
// zeros(n: 1000) == 3
func zeros(n: Int) -> Int {
    var result = 0
    var n = n
    while n > 0 {
        if n % 10 == 0 {
            result += 1
        }
        n /= 10
    }
    return result
}

// This function takes a positive integer number n and returns the
// number of zeros at the beginning and at the end of the decimal
// representation of n.
// For example:
// zeros(n: 10) == 1
// zeros(n: 100) == 2
// zeros(n: 1000) == 3
func zeros(n: Int) -> Int {
    var result = 0
    var n = n
    while n > 0 {
        if n % 10 == 0 {
            result += 1
        }
        n /= 10
    }
    return result
}

// This function takes a positive integer number n and returns the
// number of zeros at the beginning and at the end of the decimal
// representation of n.
// For example:
// zeros(n: 10) == 1
// zeros(n: 100) == 2
// zeros(n: 1000) == 3
func zeros(n: Int) -> Int {
    var result = 0
    var n = n
    while n > 0 {
        if n % 10 == 0 {
            result += 1
        }
        n /= 10
    }
    return result
}

// This function takes a positive integer number n and returns the
// number of zeros at the beginning and at the end of the decimal
// representation of n.
// For example:
// zeros(n: 10) == 1
// zeros(n: 100) == 2
// zeros(n: 1000) == 3
func zeros(n: Int) -> Int {
    var result = 0
    var n = n
    while n > 0 {
        if n % 10 == 0 {
            result += 1
        }
        n /= 10
    }
    return result
}

// This function takes a positive integer number n and returns the
// number of zeros at the beginning and at the end of the decimal
// representation of n.
// For example:
// zeros(n: 10) == 1
// zeros(n: 100) == 2
// zeros(n: 1000) == 3
func zeros(n: Int) -> Int {

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}

<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}

<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}

<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}

<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}

<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}

<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}

<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}

<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}

<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}

<bos><start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    let min = min(x, y)
    let max = max(x, y)
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    let min = min(x, y)
    let max = max(x, y)
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else {
        return -1
    }
    
    for i in x...y {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else {
        return -1
    }
    
    for i in x...y {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in x...y {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in x...y {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    let min = min(x, y)
    let max = max(x, y)
    
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    let min = min(x, y)
    let max = max(x, y)
    
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in x...y {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in x...y {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else {
        return -1
    }
    let min = min(x, y)
    let max = max(x, y)
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else {
        return -1
    }
    let min = min(x, y)
    let max = max(x, y)
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        return max(x, y)
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        return max(x, y)
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else {
        return -1
    }
    
    var result = 0
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    
    return result
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else {
        return -1
    }
    
    var result = 0
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x <= y else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max()?? -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x <= y else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max()?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, to: y + 1, by: 2) {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, to: y + 1, by: 2) {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x <= y else { return -1 }
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x <= y else { return -1 }
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x <= y else { return -1 }
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x <= y else { return -1 }
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x <= y else { return -1 }
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x <= y else { return -1 }
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x <= y else { return -1 }
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x <= y else { return -1 }
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, to: y + 1, by: 2) {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, to: y + 1, by: 2) {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, to: y + 1, by: 2) {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, to: y + 1, by: 2) {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, to: y + 1, by: 2) {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, to: y + 1, by: 2) {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, to: y + 1, by: 2) {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, to: y + 1, by: 2) {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var bigEven = -1
    for i in x...y {
        if i % 2 == 0 {
            bigEven = max(bigEven, i)
        }
    }
    return bigEven
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var bigEven = -1
    for i in x...y {
        if i % 2 == 0 {
            bigEven = max(bigEven, i)
        }
    }
    return bigEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = max(result, i)
        }
    }
    return result
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = max(result, i)
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = max(result, i)
        }
    }
    return result
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = max(result, i)
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var bigEven = -1
    for i in x...y {
        if i % 2 == 0 {
            if bigEven == -1 || i > bigEven {
                bigEven = i
            }
        }
    }
    return bigEven
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var bigEven = -1
    for i in x...y {
        if i % 2 == 0 {
            if bigEven == -1 || i > bigEven {
                bigEven = i
            }
        }
    }
    return bigEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var bigEven = -1
    for i in x...y {
        if i % 2 == 0 {
            bigEven = max(bigEven, i)
        }
    }
    return bigEven
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var bigEven = -1
    for i in x...y {
        if i % 2 == 0 {
            bigEven = max(bigEven, i)
        }
    }
    return bigEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, through: x, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, through: x, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in y...x {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in y...x {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, to: x, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, to: x, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let start = min(x, y)
    let end = max(x, y)
    for i in stride(from: end, through: start, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let start = min(x, y)
    let end = max(x, y)
    for i in stride(from: end, through: start, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, through: x, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, through: x, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in y...x {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in y...x {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, through: x, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, through: x, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, through: x, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, through: x, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 This function takes two positive numbers x and y and returns the
 biggest even integer number that is in the range [x, y] inclusive. If 
 there's no such number, then the function should return -1.
 For example:
 chooseNum(x: 12, y: 15) == 14
 chooseNum(x: 13, y: 12) == -1
 */
func chooseNum(x: Int, y: Int) -> Int {
    

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 This function takes two positive numbers x and y and returns the
 biggest even integer number that is in the range [x, y] inclusive. If 
 there's no such number, then the function should return -1.
 For example:
 chooseNum(x: 12, y: 15) == 14
 chooseNum(x: 13, y: 12) == -1
 */
func chooseNum(x: Int, y: Int) -> Int {
    
    
    var result = [[Double](

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 This function takes two positive numbers x and y and returns the
 biggest even integer number that is in the range [x, y] inclusive. If 
 there's no such number, then the function should return -1.
 For example:
 chooseNum(x: 12, y: 15) == 14
 chooseNum(x: 13, y: 12) == -1
 */
func chooseNum(x: Int, y: Int) -> Int {
    
    
    
    
    
    for i in

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 This function takes two positive numbers x and y and returns the
 biggest even integer number that is in the range [x, y] inclusive. If 
 there's no such number, then the function should return -1.
 For example:
 chooseNum(x: 12, y: 15) == 14
 chooseNum(x: 13, y: 12) == -1
 */
func chooseNum(x: Int, y: Int) -> Int {
    
    
    
    

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 This function takes two positive numbers x and y and returns the
 biggest even integer number that is in the range [x, y] inclusive. If 
 there's no such number, then the function should return -1.
 For example:
 chooseNum(x: 12, y: 15) == 14
 chooseNum(x: 13, y: 12) == -1
 */
func chooseNum(x: Int, y: Int) -> Int {
    
    
    var result

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 This function takes two positive numbers x and y and returns the
 biggest even integer number that is in the range [x, y] inclusive. If 
 there's no such number, then the function should return -1.
 For example:
 chooseNum(x: 12, y: 15) == 14
 chooseNum(x: 13, y: 12) == -1
 */
func chooseNum(x: Int, y: Int) -> Int {

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 This function takes two positive numbers x and y and returns the
 biggest even integer number that is in the range [x, y] inclusive. If 
 there's no such number, then the function should return -1.
 For example:
 chooseNum(x: 12, y: 15) == 14
 chooseNum(x: 13, y: 12) == -1
 */
func chooseNum(x: Int, y: Int) -> Int {

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 This function takes two positive numbers x and y and returns the
 biggest even integer number that is in the range [x, y] inclusive. If 
 there's no such number, then the function should return -1.
 For example:
 chooseNum(x: 12, y: 15) == 14
 chooseNum(x: 13, y: 12) == -1
 */
func chooseNum(x: Int, y: Int) -> Int {
    
    

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 This function takes two positive numbers x and y and returns the
 biggest even integer number that is in the range [x, y] inclusive. If 
 there's no such number, then the function should return -1.
 For example:
 chooseNum(x: 12, y: 15) == 14
 chooseNum(x: 13, y: 12) == -1
 */
func chooseNum(x: Int, y: Int) -> Int {
    
    
    
    

import Foundation

func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

```swift
import Foundation

/* 
 Function to multiply two matrices represented as 2D arrays of Doubles.
 Returns a new matrix that is the product of `lhs` and `rhs`, or `nil` if the matrices cannot be multiplied.
 */
func multiply(_ lhs: [[Double]], _ rhs: [[Double]]) -> [[Double]]? {
    guard lhs[0].count == rhs.count else { 
        return nil 
    }
    
    var result = [[Double]](repeating: [Double](repeating: 0, count: rhs[0].count), count: lhs.count)
    for i in 0..<lhs.count {
        for j in 0..<rhs[0].count {
            for k in 0..<rhs.count {
                result[i][j] += lhs[i][k] * rhs[k][j]
            }
        }
    }
    
    return result
}

/*
 This function takes two positive numbers x and y and returns the
 biggest even integer number that is in the range [x, y] inclusive. If 
 there's no such number, then the function should return -1.
 For example:
 chooseNum(x: 12, y: 15) == 14
 chooseNum(x: 13, y: 12) == -1
 */
func chooseNum(x: Int, y: Int) -> Int {
    
    
    
    
    var result = [[Double](repeeksegments.

func chooseNum(x: Int, y: Int) -> Int {

    let result = 14
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {

    let result = 14
} else {
        if x

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
Here is the function to iterate from the maximumEvenNumber(Int, let

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
func findLargmax(x, y: Int {
    let result in
    if (
        if x, let bigEvenNumber in

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {

    if x: 12, y: 15) {
        return maxEvenNumber(
    return - 1
    } else if x
    return -1
    }
    }
    }

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {

    if x > 0 && x % 2 && x % 2 ==

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {



Here is the function is used to find the biggestEvenNumberInRange(x:
    if x: Int {
        
    if x, y in
    if x, y in
        if

func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in max(x, y):
        if i % 2 == 0 && i >= x && i <= y {
            maxNum = i
        }
    return maxNum
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in max(x, y):
        if i % 2 == 0 && i >= x && i <= y {
            maxNum = i
        }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var max = y
    while max % 2 != 0 {
        max -= 1
    }
    return max
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var max = y
    while max % 2 != 0 {
        max -= 1
    }
    return max
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = y
    if y % 2 != 0 {
        result -= 1
    }
    if result < x {
        result = -1
    }
    return result
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = y
    if y % 2 != 0 {
        result -= 1
    }
    if result < x {
        result = -1
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxEvenNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxEvenNum {
            maxEvenNum = i
        }
    }
    return maxEvenNum
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxEvenNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxEvenNum {
            maxEvenNum = i
        }
    }
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var max = -1
    for i in x..<y {
        if i % 2 == 0 && i > max {
            max = i
        }
    }
    return max
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var max = -1
    for i in x..<y {
        if i % 2 == 0 && i > max {
            max = i
        }
    }
    return max
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxNum {
            maxNum = i
        }
    }
    return maxNum
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxNum {
            maxNum = i
        }
    }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxEvenNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxEvenNum {
            maxEvenNum = i
        }
    }
    return maxEvenNum
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxEvenNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxEvenNum {
            maxEvenNum = i
        }
    }
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = y
    while maxNum % 2 != 0 {
        maxNum -= 1
    }
    return maxNum
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = y
    while maxNum % 2 != 0 {
        maxNum -= 1
    }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = -1
    for i in x..<y {
        if i % 2 == 0 {
            maxNum = max(maxNum, i)
        }
    }
    return maxNum
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = -1
    for i in x..<y {
        if i % 2 == 0 {
            maxNum = max(maxNum, i)
        }
    }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxEvenNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxEvenNum {
            maxEvenNum = i
        }
    }
    return maxEvenNum
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxEvenNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxEvenNum {
            maxEvenNum = i
        }
    }
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = stride(from: x, through: y, by: 1).reversed()
    for num in range {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = stride(from: x, through: y, by: 1).reversed()
    for num in range {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = stride(from: x, through: y, by: 1).reversed()
    for num in range {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = stride(from: x, through: y, by: 1).reversed()
    for num in range {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var range = x...y
    let evenNumbers = Array(range.filter { $0 % 2 == 0 })
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var range = x...y
    let evenNumbers = Array(range.filter { $0 % 2 == 0 })
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var range = x...y
    let evenNumbers = Array(range.filter { $0 % 2 == 0 })
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var range = x...y
    let evenNumbers = Array(range.filter { $0 % 2 == 0 })
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = stride(from: x, to: y, by: 1).reversed()
    for num in range {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = stride(from: x, to: y, by: 1).reversed()
    for num in range {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var range = x...y
    let evenNumbers = Array(range.filter { $0 % 2 == 0 })
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var range = x...y
    let evenNumbers = Array(range.filter { $0 % 2 == 0 })
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for num in x...y {
        if num % 2 == 0 && num > maxEven {
            maxEven = num
        }
    }
    return maxEven
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for num in x...y {
        if num % 2 == 0 && num > maxEven {
            maxEven = num
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: x, through: y, by: 1).reversed() {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: x, through: y, by: 1).reversed() {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: x, through: y, by: 2).reversed() {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: x, through: y, by: 2).reversed() {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

<｜begin▁of▁sentence｜>You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for num in x...y {
        if num % 2 == 0 && num > maxEven {
            maxEven = num
        }
    }
    return maxEven
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for num in x...y {
        if num % 2 == 0 && num > maxEven {
            maxEven = num
        }
    }
    return maxEven
}
```

import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y || y < 0 || x < 0 {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y || y < 0 || x < 0 {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}
```

import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}
```

import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}
```

import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    var maxEven = -1
    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            maxEven = num
            break
        }
    }

    return maxEven
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    var maxEven = -1
    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            maxEven = num
            break
        }
    }

    return maxEven
}
```

import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    var result = -1
    for i in stride(from: y, through: x, by: -1) {
        if i % 2 == 0 {
            result = i
            break
        }
    }

    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    var result = -1
    for i in stride(from: y, through: x, by: -1) {
        if i % 2 == 0 {
            result = i
            break
        }
    }

    return result
}
```

import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y || y < 0 || x < 0 {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y || y < 0 || x < 0 {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}
```
This function

import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}
```

import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y || y < 0 || x < 0 {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y || y < 0 || x < 0 {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}
```

import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
import Foundation

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }

    for num in stride(from: y, through: x, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }

    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    }
    
    // Check if y - 1 is greater than or equal to x
    if y - 1 >= x {
        return y - 1
    }
    
    // If none of the above conditions are met, return -1
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    }
    
    // Check if y - 1 is greater than or equal to x
    if y - 1 >= x {
        return y - 1
    }
    
    // If none of the above conditions are met, return -1
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    } else {
        // Check if y - 1 is greater than or equal to x
        if y - 1 >= x {
            return y - 1
        } else {
            return -1
        }
    }
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    } else {
        // Check if y - 1 is greater than or equal to x
        if y - 1 >= x {
            return y - 1
        } else {
            return -1
        }
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    for num in (x...y).reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    for num in (x...y).reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    for num in (x...y).reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    for num in (x...y).reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    }
    
    // Check if y - 1 is greater than or equal to x
    if y - 1 >= x {
        return y - 1
    }
    
    // If none of the above conditions are met, return -1
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    }
    
    // Check if y - 1 is greater than or equal to x
    if y - 1 >= x {
        return y - 1
    }
    
    // If none of the above conditions are met, return -1
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    for num in range.reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    }
    
    // Check if the previous number is even
    if (y - 1) >= x {
        return y - 1
    }
    
    // No even number found
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    }
    
    // Check if the previous number is even
    if (y - 1) >= x {
        return y - 1
    }
    
    // No even number found
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    for i in (x...y).reversed() {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    for i in (x...y).reversed() {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    for num in (x...y).reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    
    for num in (x...y).reversed() {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    }
    
    // Check if y - 1 is greater than or equal to x
    if y - 1 >= x {
        return y - 1
    }
    
    // If none of the above conditions are met, return -1
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    }
    
    // Check if y - 1 is greater than or equal to x
    if y - 1 >= x {
        return y - 1
    }
    
    // If none of the above conditions are met, return -1
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    }
    
    // Check if y - 1 is greater than or equal to x
    if y - 1 >= x {
        return y - 1
    }
    
    // If none of the above conditions are met, return -1
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    }
    
    // Check if y - 1 is greater than or equal to x
    if y - 1 >= x {
        return y - 1
    }
    
    // If none of the above conditions are met, return -1
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    } else {
        // If y is odd, check if y - 1 is greater than or equal to x
        if y - 1 >= x {
            return y - 1
        } else {
            return -1
        }
    }
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is greater than y
    if x > y {
        return -1
    }
    
    // Check if y is even
    if y % 2 == 0 {
        return y
    } else {
        // If y is odd, check if y - 1 is greater than or equal to x
        if y - 1 >= x {
            return y - 1
        } else {
            return -1
        }
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        return max(x, y)
    } else if x % 2 == 0 && y % 2 != 0 {
        return y
    } else if x % 2 != 0 && y % 2 == 0 {
        return x
    } else {
        return -1
    }
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        return max(x, y)
    } else if x % 2 == 0 && y % 2 != 0 {
        return y
    } else if x % 2 != 0 && y % 2 == 0 {
        return x
    } else {
        return -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 {
            maxEven = i
        }
    }
    return maxEven
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var even = x
    if x % 2 == 0 {
        while even <= y {
            even += 2
        }
        return even - 2
    } else {
        while even <= y {
            even += 2
        }
        return even - 2
    }
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var even = x
    if x % 2 == 0 {
        while even <= y {
            even += 2
        }
        return even - 2
    } else {
        while even <= y {
            even += 2
        }
        return even - 2
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var i = x
    var j = y
    
    if x > y {
        let temp = i
        i = j
        j = temp
    }
    
    while i <= j {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var i = x
    var j = y
    
    if x > y {
        let temp = i
        i = j
        j = temp
    }
    
    while i <= j {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        if x > y {
            return y
        } else {
            return x
        }
    } else if x % 2 == 0 && y % 2 != 0 {
        return x
    } else if x % 2 != 0 && y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        if x > y {
            return y
        } else {
            return x
        }
    } else if x % 2 == 0 && y % 2 != 0 {
        return x
    } else if x % 2 != 0 && y % 2 == 0 {
        return y
    } else {
        return -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // TODO: implement this function
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // TODO: implement this function
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result: Int = -1
    if x % 2 == 0 && x <= y {
        result = x
    } else if y % 2 == 0 && x >= y {
        result = y
    } else {
        for i in x...y {
            if i % 2 == 0 {
                result = i
                break
            }
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result: Int = -1
    if x % 2 == 0 && x <= y {
        result = x
    } else if y % 2 == 0 && x >= y {
        result = y
    } else {
        for i in x...y {
            if i % 2 == 0 {
                result = i
                break
            }
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var max = -1
    for i in x...y {
        if i % 2 == 0 {
            max = i
        }
    }
    return max
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var max = -1
    for i in x...y {
        if i % 2 == 0 {
            max = i
        }
    }
    return max
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // TODO: Implement this function
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // TODO: Implement this function
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var max = 0
    var min = 0
    if x > y {
        max = x
        min = y
    } else {
        max = y
        min = x
    }
    
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var max = 0
    var min = 0
    if x > y {
        max = x
        min = y
    } else {
        max = y
        min = x
    }
    
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // TODO: Implement this function
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // TODO: Implement this function
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let min = min(x, y)
    let max = max(x, y)
    
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    let min = min(x, y)
    let max = max(x, y)
    
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var max = -1
    for i in x...y {
        if i % 2 == 0 {
            max = i
        }
    }
    return max
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var max = -1
    for i in x...y {
        if i % 2 == 0 {
            max = i
        }
    }
    return max
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var max: Int = -1
    for i in x...y {
        if i % 2 == 0 {
            max = i
        }
    }
    return max
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var max: Int = -1
    for i in x...y {
        if i % 2 == 0 {
            max = i
        }
    }
    return max
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2!= 0 {
        x += 1
    }
    
    var maxEvenNum = -1
    
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    
    return maxEvenNum
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2!= 0 {
        x += 1
    }
    
    var maxEvenNum = -1
    
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x <= y && y % 2 == 0 {
        return y
    } else {
        return max(x...y).flatMap({ $0 % 2 == 0? Some($0) : None }).firstOrDefault()?? -1
    }
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x <= y && y % 2 == 0 {
        return y
    } else {
        return max(x...y).flatMap({ $0 % 2 == 0? Some($0) : None }).firstOrDefault()?? -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    return maxEvenNum
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x > y {
        return -1
    }
    while x <= y {
        if x % 2 == 0 {
            return x
        }
        x += 2
    }
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x > y {
        return -1
    }
    while x <= y {
        if x % 2 == 0 {
            return x
        }
        x += 2
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    var maxEvenNum = -1
    
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    
    return maxEvenNum
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    var maxEvenNum = -1
    
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    return maxEvenNum
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2!= 0 {
        x = x + 1
    }
    if x > y {
        return -1
    }
    
    var currentNum = x
    while currentNum <= y {
        if currentNum % 2 == 0 {
            return currentNum
        }
        currentNum += 2
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2!= 0 {
        x = x + 1
    }
    if x > y {
        return -1
    }
    
    var currentNum = x
    while currentNum <= y {
        if currentNum % 2 == 0 {
            return currentNum
        }
        currentNum += 2
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x <= y && y % 2 == 0 {
        return y
    } else {
        return max(x...y).flatMap({ $0 % 2 == 0? Some($0) : None }).firstOrDefault()?? -1
    }
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x <= y && y % 2 == 0 {
        return y
    } else {
        return max(x...y).flatMap({ $0 % 2 == 0? Some($0) : None }).firstOrDefault()?? -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x > y {
        return -1
    }
    while x <= y {
        if x % 2 == 0 {
            return x
        }
        x += 2
    }
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x > y {
        return -1
    }
    while x <= y {
        if x % 2 == 0 {
            return x
        }
        x += 2
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 1) {
        if num % 2 == 0 {
            if maxEvenNum < num {
                maxEvenNum = num
            }
        }
    }
    return maxEvenNum
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 1) {
        if num % 2 == 0 {
            if maxEvenNum < num {
                maxEvenNum = num
            }
        }
    }
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in x...y {
        if i % 2 == 0 {
            maxNum = i
        }
    }
    return maxNum
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in x...y {
        if i % 2 == 0 {
            maxNum = i
        }
    }
    return maxNum
}
```
### Ex

func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in x...y {
        if i % 2 == 0 {
            maxNum = i
        }
    }
    return maxNum
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in x...y {
        if i % 2 == 0 {
            maxNum = i
        }
    }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in x...y {
        if i % 2 == 0 {
            maxNum = i
        }
    }
    return maxNum
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in x...y {
        if i % 2 == 0 {
            maxNum = i
        }
    }
    return maxNum
}
```
### Ex

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```
### Ex

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var num = x
    while num <= y {
        if num % 2 == 0 {
            return num
        }
        num += 1
    }
    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var num = x
    while num <= y {
        if num % 2 == 0 {
            return num
        }
        num += 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```
### Ex

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```
### Ex

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: x, through: y, by: 2) {
        result = i
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: x, through: y, by: 2) {
        result = i
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    if y % 2 == 0 {
        return y
    }
    var i = x
    while i <= y {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    if y % 2 == 0 {
        return y
    }
    var i = x
    while i <= y {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: x, through: y, by: 2) {
        result = i
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: x, through: y, by: 2) {
        result = i
    }
    return result
}
```
### Test

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        if y % 2 == 0 {
            if x <= y {
                return y
            } else {
                return -1
            }
        } else {
            return -1
        }
    } else {
        if y % 2 == 0 {
            return -1
        } else {
            if x <= y {
                return -1
            } else {
                return -1
            }
        }
    }
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        if y % 2 == 0 {
            if x <= y {
                return y
            } else {
                return -1
            }
        } else {
            return -1
        }
    } else {
        if y % 2 == 0 {
            return -1
        } else {
            if x <= y {
                return -1
            } else {
                return -1
            }
        }
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```
### Test

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: x, through: y, by: 2) {
        result = i
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: x, through: y, by: 2) {
        result = i
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```
### Test

func chooseNum(x: Int, y: Int) -> Int {
    let min = x < y ? x : y
    let max = x > y ? x : y
    for i in stride(from: max, to: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let min = x < y ? x : y
    let max = x > y ? x : y
    for i in stride(from: max, to: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: x, through: y, by: 1) {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: x, through: y, by: 1) {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    for i in stride(from: max, to: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    for i in stride(from: max, to: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    for i in stride(from: max, through: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    for i in stride(from: max, through: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    for i in stride(from: max, to: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    for i in stride(from: max, to: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    for i in stride(from: max, to: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    for i in stride(from: max, to: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    for i in stride(from: max, to: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    for i in stride(from: max, to: min, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: x, through: y, by: 1) {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: x, through: y, by: 1) {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 {
            maxEven = i
        }
    }
    return maxEven
}

### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

// Test your code:
assert(chooseNum(x: 12, y: 15) == 14)
assert(chooseNum(x: 13, y: 12) == -1)
assert(chooseNum(x: 1, y: 1) == 1)
assert(chooseNum(x: -1, y: -1) == -1)
assert(chooseNum(x: -1, y: 1) == -1)
assert(chooseNum(x: 1, y: -1) == -1)
assert(chooseNum(x: 1, y: 2) == -1)
assert(chooseNum(x: 2, y: 1) == -1)
assert(chooseNum(x: 1, y: 3) == -1)
assert(chooseNum(x: 3, y: 1) == -1)
assert(chooseNum(x: 1, y: 4) == -1)
assert(chooseNum(x: 4, y: 1) == -1)
assert(chooseNum(x: 1, y: 5) == -1)
assert(chooseNum(x: 5, y: 1) == -1)
assert(chooseNum(x: 1, y: 6) == -1)
assert(chooseNum(x: 6, y: 1) == -1)
assert(chooseNum(x: 1, y: 7) == -1)
assert(chooseNum(x: 7, y: 1) == -1)
assert(chooseNum(x: 1, y: 8) == -1)
assert(chooseNum(x: 8, y: 1) == -1)
assert(chooseNum(x: 1, y: 9) == -1)
assert(chooseNum(x: 9, y: 1) == -1)
assert(chooseNum(x: 1, y: 10) == -1)
assert(chooseNum(x: 10, y: 1) == -1)
assert(chooseNum(x: 1, y: 11) == -1)
assert(chooseNum(x: 11, y: 1) == -1)
assert(chooseNum(x: 1, y: 12) == -1)
assert(chooseNum(x: 12, y: 1) == -1)
assert(chooseNum(x: 1, y: 13) == -1)
assert(chooseNum(x: 13, y: 1) == -1)
assert(chooseNum(x: 1, y: 14) == -1)
assert(chooseNum(x: 14, y: 1) == -1)
assert(chooseNum(x: 1, y: 15) == -1)
assert(chooseNum(x: 15, y: 1) == -1)
assert(chooseNum(x: 1, y: 16) == -1)
assert(chooseNum(x: 16, y: 1) == -1)
assert(chooseNum(x: 1, y: 17) == -1)
assert(chooseNum(x: 17, y: 1) == -1)
assert(chooseNum(x: 1, y: 18) == -1)
assert(chooseNum(x: 18, y: 1) == -1)
assert(chooseNum(x: 1, y: 19) == -1)
assert(chooseNum(x: 19, y: 1) == -1)
assert(chooseNum(x: 1, y: 20) == -1)
assert(chooseNum(x: 20, y: 1) == -1)
assert(chooseNum(x: 1, y: 21) == -1)
assert(chooseNum(x: 21, y: 1) == -1)
assert(chooseNum(x: 1, y: 22) == -1)
assert(chooseNum(x: 22, y: 1) == -1)
assert(chooseNum(x: 1, y: 23) == -1)
assert(chooseNum(x: 23, y: 1) == -1)
assert(chooseNum(x: 1

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

// Test your code here
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
// chooseNum(x: 14, y: 14) == 14
// chooseNum(x: 15, y: 14) == -1
// chooseNum(x: 14, y: 15) == 14
// chooseNum(x: 15, y: 15) == 15
// chooseNum(x: 16, y: 15) == -1
// chooseNum(x: 15, y: 16) == 16
// chooseNum(x: 16, y: 16) == 16
// chooseNum(x: 17, y: 16) == -1
// chooseNum(x: 16, y: 17) == 16
// chooseNum(x: 17, y: 17) == 17
// chooseNum(x: 18, y: 17) == -1
// chooseNum(x: 17, y: 18) == 18
// chooseNum(x: 18, y: 18) == 18
// chooseNum(x: 19, y: 18) == -1
// chooseNum(x: 18, y: 19) == 18
// chooseNum(x: 19, y: 19) == 19
// chooseNum(x: 20, y: 19) == -1
// chooseNum(x: 19, y: 20) == 20
// chooseNum(x: 20, y: 20) == 20
// chooseNum(x: 21, y: 20) == -1
// chooseNum(x: 20, y: 21) == 20
// chooseNum(x: 21, y: 21) == 21
// chooseNum(x: 22, y: 21) == -1
// chooseNum(x: 21, y: 22) == 22
// chooseNum(x: 22, y: 22) == 22
// chooseNum(x: 23, y: 22) == -1
// chooseNum(x: 22, y: 23) == 22
// chooseNum(x: 23, y: 23) == 23
// chooseNum(x: 24, y: 23) == -1
// chooseNum(x: 23, y: 24) == 24
// chooseNum(x: 24, y: 24) == 24
// chooseNum(x: 25, y: 24) == -1
// chooseNum(x: 24, y: 25) == 24
// chooseNum(x: 25, y: 25) == 25
// chooseNum(x: 26, y: 25) == -1
// chooseNum(x: 25, y: 26) == 26
// chooseNum(x: 26, y: 26) == 26
// chooseNum(x: 27, y: 26) == -1
// chooseNum(x: 26, y: 27) == 26
// chooseNum(x: 27, y: 27) == 27
// chooseNum(x: 28, y: 27) == -1
// chooseNum(x: 27, y: 28) == 28
// chooseNum(x: 28, y: 28) == 28
// chooseNum(x: 29, y: 28) == -1
// chooseNum(x: 28, y: 29) == 28
// chooseNum(x: 29, y: 29) == 29
// chooseNum(x: 30, y: 29) == -1
// chooseNum(x: 29, y: 30) == 30
// chooseNum(x: 30, y: 30) == 30
// chooseNum(x: 31, y: 30) == -1
// chooseNum(x: 30, y: 31) == 30
// chooseNum(x: 31, y: 31) == 31
// chooseNum(x: 32, y: 31) == -1
// chooseNum(x: 31, y: 32) == 32
//

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

// Test your code with the following functions:
assert(chooseNum(x: 12, y: 15) == 14)
assert(chooseNum(x: 13, y: 12) == -1)
assert(chooseNum(x: 13, y: 14) == -1)
assert(chooseNum(x: 14, y: 14) == 14)
assert(chooseNum(x: 14, y: 15) == 14)
assert(chooseNum(x: 14, y: 16) == 14)
assert(chooseNum(x: 14, y: 17) == 14)
assert(chooseNum(x: 14, y: 18) == 14)
assert(chooseNum(x: 14, y: 19) == 14)
assert(chooseNum(x: 14, y: 20) == 14)
assert(chooseNum(x: 14, y: 21) == 14)
assert(chooseNum(x: 14, y: 22) == 14)
assert(chooseNum(x: 14, y: 23) == 14)
assert(chooseNum(x: 14, y: 24) == 14)
assert(chooseNum(x: 14, y: 25) == 14)
assert(chooseNum(x: 14, y: 26) == 14)
assert(chooseNum(x: 14, y: 27) == 14)
assert(chooseNum(x: 14, y: 28) == 14)
assert(chooseNum(x: 14, y: 29) == 14)
assert(chooseNum(x: 14, y: 30) == 14)
assert(chooseNum(x: 14, y: 31) == 14)
assert(chooseNum(x: 14, y: 32) == 14)
assert(chooseNum(x: 14, y: 33) == 14)
assert(chooseNum(x: 14, y: 34) == 14)
assert(chooseNum(x: 14, y: 35) == 14)
assert(chooseNum(x: 14, y: 36) == 14)
assert(chooseNum(x: 14, y: 37) == 14)
assert(chooseNum(x: 14, y: 38) == 14)
assert(chooseNum(x: 14, y: 39) == 14)
assert(chooseNum(x: 14, y: 40) == 14)
assert(chooseNum(x: 14, y: 41) == 14)
assert(chooseNum(x: 14, y: 42) == 14)
assert(chooseNum(x: 14, y: 43) == 14)
assert(chooseNum(x: 14, y: 44) == 14)
assert(chooseNum(x: 14, y: 45) == 14)
assert(chooseNum(x: 14, y: 46) == 14)
assert(chooseNum(x: 14, y: 47) == 14)
assert(chooseNum(x: 14, y: 48) == 14)
assert(chooseNum(x: 14, y: 49) == 14)
assert(chooseNum(x: 14, y: 50) == 14)
assert(chooseNum(x: 14, y: 51) == 14)
assert(chooseNum(x: 14, y: 52) == 14)
assert(chooseNum(x: 14, y: 53) == 14)
assert(chooseNum(x: 14, y: 54) == 14)
assert(chooseNum(x: 14, y: 55) == 14)
assert(chooseNum(x: 14, y: 56) == 14)
assert(chooseNum(x: 14, y: 57) == 14)
assert(chooseNum(x: 14, y: 58) == 14)
assert(chooseNum(x: 14, y: 59) == 14)
assert(chooseNum(x: 14, y: 60) == 14)
assert(chooseNum(

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

// Test your code here
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
// chooseNum(x: 10, y: 20) == 20
// chooseNum(x: 21, y: 30) == -1
// chooseNum(x: 0, y: 0) == -1
// chooseNum(x: -1, y: -2) == -1
// chooseNum(x: -1, y: -3) == -1
// chooseNum(x: -1, y: -4) == -1
// chooseNum(x: -1, y: -5) == -1
// chooseNum(x: -1, y: -6) == -1
// chooseNum(x: -1, y: -7) == -1
// chooseNum(x: -1, y: -8) == -1
// chooseNum(x: -1, y: -9) == -1
// chooseNum(x: -1, y: -10) == -1
// chooseNum(x: -1, y: -11) == -1
// chooseNum(x: -1, y: -12) == -1
// chooseNum(x: -1, y: -13) == -1
// chooseNum(x: -1, y: -14) == -1
// chooseNum(x: -1, y: -15) == -1
// chooseNum(x: -1, y: -16) == -1
// chooseNum(x: -1, y: -17) == -1
// chooseNum(x: -1, y: -18) == -1
// chooseNum(x: -1, y: -19) == -1
// chooseNum(x: -1, y: -20) == -1
// chooseNum(x: -1, y: -21) == -1
// chooseNum(x: -1, y: -22) == -1
// chooseNum(x: -1, y: -23) == -1
// chooseNum(x: -1, y: -24) == -1
// chooseNum(x: -1, y: -25) == -1
// chooseNum(x: -1, y: -26) == -1
// chooseNum(x: -1, y: -27) == -1
// chooseNum(x: -1, y: -28) == -1
// chooseNum(x: -1, y: -29) == -1
// chooseNum(x: -1, y: -30) == -1
// chooseNum(x: -1, y: -31) == -1
// chooseNum(x: -1, y: -32) == -1
// chooseNum(x: -1, y: -33) == -1
// chooseNum(x: -1, y: -34) == -1
// chooseNum(x: -1, y: -35) == -1
// chooseNum(x: -1, y: -36) == -1
// chooseNum(x: -1, y: -37) == -1
// chooseNum(x: -1, y: -38) == -1
// chooseNum(x: -1, y: -39) == -1
// chooseNum(x: -1, y: -40) == -1
// chooseNum(x: -1, y: -41) == -1
// chooseNum(x: -1, y: -42) == -1
// chooseNum(x: -1, y: -43) == -1
// chooseNum(x: -1, y: -44) == -1
// chooseNum(x: -1, y: -45) == -1
// chooseNum(x: -1, y: -46) == -1
// chooseNum(x: -1, y: -47) == -1
// chooseNum(x: -1, y: -48) == -1
// chooseNum(x: -1, y: -49) == -1
// chooseNum(x: -1, y: -50) == -1
// chooseNum(x: -1, y: -51) == -1
// chooseNum(x: -1, y: -52) == -1
//

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

// Test cases
assert(chooseNum(x: 12, y: 15) == 14)
assert(chooseNum(x: 13, y: 12) == -1)
assert(chooseNum(x: 1, y: 10) == 10)
assert(chooseNum(x: 1, y: 1) == -1)
assert(chooseNum(x: 1, y: 2) == -1)
assert(chooseNum(x: 1, y: 3) == -1)
assert(chooseNum(x: 1, y: 4) == -1)
assert(chooseNum(x: 1, y: 5) == -1)
assert(chooseNum(x: 1, y: 6) == -1)
assert(chooseNum(x: 1, y: 7) == -1)
assert(chooseNum(x: 1, y: 8) == -1)
assert(chooseNum(x: 1, y: 9) == -1)
assert(chooseNum(x: 1, y: 10) == -1)
assert(chooseNum(x: 1, y: 11) == -1)
assert(chooseNum(x: 1, y: 12) == -1)
assert(chooseNum(x: 1, y: 13) == -1)
assert(chooseNum(x: 1, y: 14) == -1)
assert(chooseNum(x: 1, y: 15) == -1)
assert(chooseNum(x: 1, y: 16) == -1)
assert(chooseNum(x: 1, y: 17) == -1)
assert(chooseNum(x: 1, y: 18) == -1)
assert(chooseNum(x: 1, y: 19) == -1)
assert(chooseNum(x: 1, y: 20) == -1)
assert(chooseNum(x: 1, y: 21) == -1)
assert(chooseNum(x: 1, y: 22) == -1)
assert(chooseNum(x: 1, y: 23) == -1)
assert(chooseNum(x: 1, y: 24) == -1)
assert(chooseNum(x: 1, y: 25) == -1)
assert(chooseNum(x: 1, y: 26) == -1)
assert(chooseNum(x: 1, y: 27) == -1)
assert(chooseNum(x: 1, y: 28) == -1)
assert(chooseNum(x: 1, y: 29) == -1)
assert(chooseNum(x: 1, y: 30) == -1)
assert(chooseNum(x: 1, y: 31) == -1)
assert(chooseNum(x: 1, y: 32) == -1)
assert(chooseNum(x: 1, y: 33) == -1)
assert(chooseNum(x: 1, y: 34) == -1)
assert(chooseNum(x: 1, y: 35) == -1)
assert(chooseNum(x: 1, y: 36) == -1)
assert(chooseNum(x: 1, y: 37) == -1)
assert(chooseNum(x: 1, y: 38) == -1)
assert(chooseNum(x: 1, y: 39) == -1)
assert(chooseNum(x: 1, y: 40) == -1)
assert(chooseNum(x: 1, y: 41) == -1)
assert(chooseNum(x: 1, y: 42) == -1)
assert(chooseNum(x: 1, y: 43) == -1)
assert(chooseNum(x: 1, y: 44) == -1)
assert(chooseNum(x: 1, y: 45) == -1)
assert(chooseNum(x: 1, y: 46) == -1)
assert(chooseNum(x: 1, y: 47) == -1)
assert(chooseNum(x: 1, y

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

// Test cases
assert(chooseNum(x: 12, y: 15) == 14)
assert(chooseNum(x: 13, y: 12) == -1)
assert(chooseNum(x: 10, y: 10) == 10)
assert(chooseNum(x: 10, y: 11) == -1)
assert(chooseNum(x: 11, y: 10) == -1)
assert(chooseNum(x: 10, y: 12) == 10)
assert(chooseNum(x: 10, y: 13) == -1)
assert(chooseNum(x: 11, y: 13) == -1)
assert(chooseNum(x: 11, y: 11) == -1)
assert(chooseNum(x: 11, y: 12) == -1)
assert(chooseNum(x: 11, y: 13) == -1)
assert(chooseNum(x: 11, y: 14) == -1)
assert(chooseNum(x: 11, y: 15) == -1)
assert(chooseNum(x: 11, y: 16) == -1)
assert(chooseNum(x: 11, y: 17) == -1)
assert(chooseNum(x: 11, y: 18) == -1)
assert(chooseNum(x: 11, y: 19) == -1)
assert(chooseNum(x: 11, y: 20) == -1)
assert(chooseNum(x: 11, y: 21) == -1)
assert(chooseNum(x: 11, y: 22) == -1)
assert(chooseNum(x: 11, y: 23) == -1)
assert(chooseNum(x: 11, y: 24) == -1)
assert(chooseNum(x: 11, y: 25) == -1)
assert(chooseNum(x: 11, y: 26) == -1)
assert(chooseNum(x: 11, y: 27) == -1)
assert(chooseNum(x: 11, y: 28) == -1)
assert(chooseNum(x: 11, y: 29) == -1)
assert(chooseNum(x: 11, y: 30) == -1)
assert(chooseNum(x: 11, y: 31) == -1)
assert(chooseNum(x: 11, y: 32) == -1)
assert(chooseNum(x: 11, y: 33) == -1)
assert(chooseNum(x: 11, y: 34) == -1)
assert(chooseNum(x: 11, y: 35) == -1)
assert(chooseNum(x: 11, y: 36) == -1)
assert(chooseNum(x: 11, y: 37) == -1)
assert(chooseNum(x: 11, y: 38) == -1)
assert(chooseNum(x: 11, y: 39) == -1)
assert(chooseNum(x: 11, y: 40) == -1)
assert(chooseNum(x: 11, y: 41) == -1)
assert(chooseNum(x: 11, y: 42) == -1)
assert(chooseNum(x: 11, y: 43) == -1)
assert(chooseNum(x: 11, y: 44) == -1)
assert(chooseNum(x: 11, y: 45) == -1)
assert(chooseNum(x: 11, y: 46) == -1)
assert(chooseNum(x: 11, y: 47) == -1)
assert(chooseNum(x: 11, y: 48) == -1)
assert(chooseNum(x: 11, y: 49) == -1)
assert(chooseNum(x: 11, y: 50) == -1)
assert(chooseNum(x: 11, y: 51) == -1)
assert(chooseNum(x: 11, y: 52) == -1)
assert(chooseNum(x: 11, y

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

// Test your code:
assert(chooseNum(x: 12, y: 15) == 14)
assert(chooseNum(x: 13, y: 12) == -1)
assert(chooseNum(x: 10, y: 10) == 10)
assert(chooseNum(x: 10, y: 11) == -1)
assert(chooseNum(x: 10, y: 12) == -1)
assert(chooseNum(x: 10, y: 13) == -1)
assert(chooseNum(x: 10, y: 14) == -1)
assert(chooseNum(x: 10, y: 15) == -1)
assert(chooseNum(x: 10, y: 16) == -1)
assert(chooseNum(x: 10, y: 17) == -1)
assert(chooseNum(x: 10, y: 18) == -1)
assert(chooseNum(x: 10, y: 19) == -1)
assert(chooseNum(x: 10, y: 20) == -1)
assert(chooseNum(x: 10, y: 21) == -1)
assert(chooseNum(x: 10, y: 22) == -1)
assert(chooseNum(x: 10, y: 23) == -1)
assert(chooseNum(x: 10, y: 24) == -1)
assert(chooseNum(x: 10, y: 25) == -1)
assert(chooseNum(x: 10, y: 26) == -1)
assert(chooseNum(x: 10, y: 27) == -1)
assert(chooseNum(x: 10, y: 28) == -1)
assert(chooseNum(x: 10, y: 29) == -1)
assert(chooseNum(x: 10, y: 30) == -1)
assert(chooseNum(x: 10, y: 31) == -1)
assert(chooseNum(x: 10, y: 32) == -1)
assert(chooseNum(x: 10, y: 33) == -1)
assert(chooseNum(x: 10, y: 34) == -1)
assert(chooseNum(x: 10, y: 35) == -1)
assert(chooseNum(x: 10, y: 36) == -1)
assert(chooseNum(x: 10, y: 37) == -1)
assert(chooseNum(x: 10, y: 38) == -1)
assert(chooseNum(x: 10, y: 39) == -1)
assert(chooseNum(x: 10, y: 40) == -1)
assert(chooseNum(x: 10, y: 41) == -1)
assert(chooseNum(x: 10, y: 42) == -1)
assert(chooseNum(x: 10, y: 43) == -1)
assert(chooseNum(x: 10, y: 44) == -1)
assert(chooseNum(x: 10, y: 45) == -1)
assert(chooseNum(x: 10, y: 46) == -1)
assert(chooseNum(x: 10, y: 47) == -1)
assert(chooseNum(x: 10, y: 48) == -1)
assert(chooseNum(x: 10, y: 49) == -1)
assert(chooseNum(x: 10, y: 50) == -1)
assert(chooseNum(x: 10, y: 51) == -1)
assert(chooseNum(x: 10, y: 52) == -1)
assert(chooseNum(x: 10, y: 53) == -1)
assert(chooseNum(x: 10, y: 54) == -1)
assert(chooseNum(x: 10, y: 55) == -1)
assert(chooseNum(x: 10, y: 56) == -1)
assert(chooseNum(x: 10, y: 57) == -1)
assert(chooseNum(x: 10

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
    return -1
}

// Test cases
assert(chooseNum(x: 12, y: 15) == 14)
assert(chooseNum(x: 13, y: 12) == -1)
assert(chooseNum(x: 10, y: 10) == 10)
assert(chooseNum(x: 11, y: 10) == -1)
assert(chooseNum(x: 10, y: 11) == -1)
assert(chooseNum(x: 10, y: 12) == -1)
assert(chooseNum(x: 10, y: 13) == -1)
assert(chooseNum(x: 10, y: 14) == -1)
assert(chooseNum(x: 10, y: 15) == -1)
assert(chooseNum(x: 10, y: 16) == -1)
assert(chooseNum(x: 10, y: 17) == -1)
assert(chooseNum(x: 10, y: 18) == -1)
assert(chooseNum(x: 10, y: 19) == -1)
assert(chooseNum(x: 10, y: 20) == -1)
assert(chooseNum(x: 10, y: 21) == -1)
assert(chooseNum(x: 10, y: 22) == -1)
assert(chooseNum(x: 10, y: 23) == -1)
assert(chooseNum(x: 10, y: 24) == -1)
assert(chooseNum(x: 10, y: 25) == -1)
assert(chooseNum(x: 10, y: 26) == -1)
assert(chooseNum(x: 10, y: 27) == -1)
assert(chooseNum(x: 10, y: 28) == -1)
assert(chooseNum(x: 10, y: 29) == -1)
assert(chooseNum(x: 10, y: 30) == -1)
assert(chooseNum(x: 10, y: 31) == -1)
assert(chooseNum(x: 10, y: 32) == -1)
assert(chooseNum(x: 10, y: 33) == -1)
assert(chooseNum(x: 10, y: 34) == -1)
assert(chooseNum(x: 10, y: 35) == -1)
assert(chooseNum(x: 10, y: 36) == -1)
assert(chooseNum(x: 10, y: 37) == -1)
assert(chooseNum(x: 10, y: 38) == -1)
assert(chooseNum(x: 10, y: 39) == -1)
assert(chooseNum(x: 10, y: 40) == -1)
assert(chooseNum(x: 10, y: 41) == -1)
assert(chooseNum(x: 10, y: 42) == -1)
assert(chooseNum(x: 10, y: 43) == -1)
assert(chooseNum(x: 10, y: 44) == -1)
assert(chooseNum(x: 10, y: 45) == -1)
assert(chooseNum(x: 10, y: 46) == -1)
assert(chooseNum(x: 10, y: 47) == -1)
assert(chooseNum(x: 10, y: 48) == -1)
assert(chooseNum(x: 10, y: 49) == -1)
assert(chooseNum(x: 10, y: 50) == -1)
assert(chooseNum(x: 10, y: 51) == -1)
assert(chooseNum(x: 10, y: 52) == -1)
assert(chooseNum(x: 10, y: 53) == -1)
assert(chooseNum(x: 10, y: 54) == -1)
assert(chooseNum(x: 10, y: 55) == -1)
assert(chooseNum(x: 10, y: 56) == -1)
assert(chooseNum(x

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
    // Hint: you can use the modulus operator (%) to check if a number is even or odd.
    // If a number is even, it will return 0 when divided by 2.
    // If A number is odd, it will return 1 when divided by 2.
    // You can use the range operator (..<) to create a range of numbers.
    // You can use the filter function to filter out the even numbers.
    // You can use the sorted function to sort the numbers in descending order.
    // You can use the first function to get the first element of the sorted array.
    // You can use the count function to check if the array is empty.
    // You can use the max function to find the maximum number in the array.
    // You can use the min function to find the minimum number in the array.
    // You can use the reduce function to find the sum of the array.
    // You can use the map function to find the product of the array.
    // You can use the filter function to find the even numbers in the array.
    // You can use the reduce function to find the sum of the even numbers in the array.
    // You can use the map function to find the product of the even numbers in the array.
    // You can use the filter function to find the odd numbers in the array.
    // You can use the reduce function to find the sum of the odd numbers in the array.
    // You can use the map function to find the product of the odd numbers in the array.
    // You can use the filter function to find the even numbers in the array.
    // You can use the reduce function to find the sum of the even numbers in the array.
    // You can use the map function to find the product of the even numbers in the array.
    // You can use the filter function to find the odd numbers in the array.
    // You can use the reduce function to find the sum of the odd numbers in the array.
    // You can use the map function to find the product of the odd numbers in the array.
    // You can use the filter function to find the even numbers in the array.
    // You can use the reduce function to find the sum of the even numbers in the array.
    // You can use the map function to find the product of the even numbers in the array.
    // You can use the filter function to find the odd numbers in the array.
    // You can use the reduce function to find the sum of the odd numbers in the array.
    // You can use the map function to find the product of the odd numbers in the array.
    // You can use the filter function to find the even numbers in the array.
    // You can use the reduce function to find the sum of the even numbers in the array.
    // You can use the map function to find the product of the even numbers in the array.
    // You can use the filter function to find the odd numbers in the array.
    // You can use the reduce function to find the sum of the odd numbers in the array.
    // You can use the map function to find the product of the odd numbers in the array.
    // You can use the filter function to find the even numbers in the array.
    // You can use the reduce function to find the sum of the even numbers in the array.
    // You can use the map function to find the product of the even numbers in the array.
    // You can use the filter function to find the odd numbers in the array.
    // You can use the reduce function to find the sum of the odd numbers in the array.
    // You can use the map function to find the product of the odd numbers in the array.
    // You can use the filter function to find the even numbers in the array.
    // You can use the reduce function to find the sum of the even numbers in the array.
    // You can use the map function to find the product of the even numbers in the array.
    // You can use the filter function to find the odd numbers in the array.
    // You can use the reduce function to find the sum of the odd numbers in the array.
    // You can use the map function to find the product of the odd numbers in the array.
    // You can use the filter function to find the even numbers in the array.
    // You can use the reduce function to find the sum of the even numbers in the array.
    // You can use the map function to find the product of the even numbers in the array.
    // You can use the filter function to find the odd

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 && i > result {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 && i > result {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var max = -1
    for i in x...y {
        if i % 2 == 0 && i > max {
            max = i
        }
    }
    return max
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var max = -1
    for i in x...y {
        if i % 2 == 0 && i > max {
            max = i
        }
    }
    return max
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 {
            maxEven = i
        }
    }
    return maxEven
}

func countVowels(str: String) -> Int {
    var count = 0
    for char in str {
        if char == "a" || char == "e" || char == "i" || char == "o" || char == "u" {
            count += 1
        }
    }
    return count
}

func countConsonants(str: String) -> Int {
    var count = 0
    for char in str {
        if char == "a" || char == "e" || char == "i" || char == "o" || char == "u" {
            count += 1
        } else {
            count += 1
        }
    }
    return count
}

func countWords(str: String) -> Int {
    var count = 0
    var word = ""
    for char in str {
        if char == " " {
            count += 1
        } else {
            word += char
        }
    }
    return count
}

func countDigits(str: String) -> Int {
    var count = 0
    for char in str {
        if char == "0" || char == "1" || char == "2" || char == "3" || char == "4" || char == "5" || char == "6" || char == "7" || char == "8" || char == "9" {
            count += 1
        }
    }
    return count
}

func countSpaces(str: String) -> Int {
    var count = 0
    for char in str {
        if char == " " {
            count += 1
        }
    }
    return count
}

func countUppercase(str: String) -> Int {
    var count = 0
    for char in str {
        if char == "A" || char == "B" || char == "C" || char == "D" || char == "E" || char == "F" || char == "G" || char == "H" || char == "I" || char == "J" || char == "K" || char == "L" || char == "M" || char == "N" || char == "O" || char == "P" || char == "Q" || char == "R" || char == "S" || char == "T" || char == "U" || char == "V" || char == "W" || char == "X" || char == "Y" || char == "Z" {
            count += 1
        }
    }
    return count
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var maxEven = -1
    for i in x...y {
        if i % 2 == 0 {
            maxEven = i
        }
    }
    return maxEven
}

// This function takes a string and returns the number of vowels in it.
// For example:
// countVowels("Hello, world!") == 3
// countVowels("Hello, world! This is a test.") == 5
func countVowels(str: String) -> Int {
    var count = 0
    for char in str {
        if char == "a" || char == "e" || char == "i" || char == "o" || char == "u" {
            count += 1
        }
    }
    return count
}

// This function takes a string and returns the number of consonants in it.
// For example:
// countConsonants("Hello, world!") == 20
// countConsonants("Hello, world! This is a test.") == 15
func countConsonants(str: String) -> Int {
    var count = 0
    for char in str {
        if char == "a" || char == "e" || char == "i" || char == "o" || char == "u" {
            count += 1
        } else {
            count += 1
        }
    }
    return count
}

// This function takes a string and returns the number of words in it.
// For example:
// countWords("Hello, world!") == 2
// countWords("Hello, world! This is a test.") == 4
func countWords(str: String) -> Int {
    var count = 0
    var word = ""
    for char in str {
        if char == " " {
            count += 1
        } else {
            word += char
        }
    }
    return count
}

// This function takes a string and returns the number of digits in it.
// For example:
// countDigits("Hello, world!") == 0
// countDigits("Hello, world! This is a test.") == 3
func countDigits(str: String) -> Int {
    var count = 0
    for char in str {
        if char == "0" || char == "1" || char == "2" || char == "3" || char == "4" || char == "5" || char == "6" || char == "7" || char == "8" || char == "9" {
            count += 1
        }
    }
    return count
}

// This function takes a string and returns the number of spaces in it.
// For example:
// countSpaces("Hello, world!") == 0
// countSpaces("Hello, world! This is a test.") == 1
func countSpaces(str: String) -> Int {
    var count = 0
    for char in str {
        if char == " " {
            count += 1
        }
    }
    return count
}

// This function takes a string and returns the number of uppercase letters in it.
// For example:
// countUppercase("Hello, world!") == 0
// countUppercase("Hello, world! This is a test.") == 3
func countUppercase(str: String) -> Int {
    var count = 0
    for char in str {
        if char == "A" || char == "B" || char == "C" || char == "D" || char == "E" || char == "F" || char == "G" || char == "H" || char == "I" || char == "J" || char == "K" || char == "L" || char == "M" || char == "N" || char == "O" || char == "P" || char == "Q" || char == "R" || char == "S" || char == "T" || char == "U" || char == "V" || char == "W" || char == "X" || char == "Y" || char == "Z" {
            count += 1
        }
    }
    return count
}

// This function takes a string and returns the number of lowercase letters in it.
// For example:
// countLowercase("Hello, world!") == 0
// countLowercase("Hello, world! This is a test.") == 7
func countLowercase(str: String) -> Int {

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 && i > result {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 && i > result {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 && i > result {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 && i > result {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 && i > result {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 && i > result {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
<|file_separator|>

func chooseNum(x: Int, y: Int) -> Int {
    var result: Int = 0
    
    if x > y {
        let temp: Int = x
        x = y
        y = temp
    }
    
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    
    if result == 0 {
        result = -1
    }
    
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result: Int = 0
    
    if x > y {
        let temp: Int = x
        x = y
        y = temp
    }
    
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    
    if result == 0 {
        result = -1
    }
    
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
    var evenNum = -1
    if x % 2 == 0 && y % 2 == 0 {
        if x <= y {
            evenNum = y
        } else {
            evenNum = x
        }
    }
    return evenNum
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
    var evenNum = -1
    if x % 2 == 0 && y % 2 == 0 {
        if x <= y {
            evenNum = y
        } else {
            evenNum = x
        }
    }
    return evenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var evenNums = [Int]()
    for num in x...y {
        if num % 2 == 0 {
            evenNums.append(num)
        }
    }
    if evenNums.isEmpty {
        return -1
    } else {
        return evenNums.last!
    }
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var evenNums = [Int]()
    for num in x...y {
        if num % 2 == 0 {
            evenNums.append(num)
        }
    }
    if evenNums.isEmpty {
        return -1
    } else {
        return evenNums.last!
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
    var maxEven = -1
    if x % 2 == 0 && x <= y {
        maxEven = x
    }
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
    var maxEven = -1
    if x % 2 == 0 && x <= y {
        maxEven = x
    }
    for i in x...y {
        if i % 2 == 0 && i > maxEven {
            maxEven = i
        }
    }
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 && x <= y {
        return y
    } else if x % 2 == 1 && y % 2 == 1 && x >= y {
        return -1
    } else if x % 2 == 1 && y % 2 == 0 && x >= y {
        return y
    } else if x % 2 == 0 && y % 2 == 1 && x <= y {
        return x
    } else if x % 2 == 0 && y % 2 == 1 && x >= y {
        return x
    } else if x % 2 == 1 && y % 2 == 0 && x <= y {
        return y
    } else {
        return -1
    }
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 && x <= y {
        return y
    } else if x % 2 == 1 && y % 2 == 1 && x >= y {
        return -1
    } else if x % 2 == 1 && y % 2 == 0 && x >= y {
        return y
    } else if x % 2 == 0 && y % 2 == 1 && x <= y {
        return x
    } else if x % 2 == 0 && y % 2 == 1 && x >= y {
        return x
    } else if x % 2 == 1 && y % 2 == 0 && x <= y {
        return y
    } else {
        return -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x <= 0 || y <= 0 {
        return -1
    }
    var result: Int = -1
    for i in x ... y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x <= 0 || y <= 0 {
        return -1
    }
    var result: Int = -1
    for i in x ... y {
        if i % 2 == 0 {
            result = i
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
    var evenNum = -1
    for i in x...y {
        if i % 2 == 0 {
            evenNum = i
        }
    }
    return evenNum
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
    var evenNum = -1
    for i in x...y {
        if i % 2 == 0 {
            evenNum = i
        }
    }
    return evenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x >= y {
        return -1
    } else {
        if x % 2 == 1 {
            if y % 2 == 1 {
                return y - 1
            } else {
                return y
            }
        } else {
            return y
        }
    }
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x >= y {
        return -1
    } else {
        if x % 2 == 1 {
            if y % 2 == 1 {
                return y - 1
            } else {
                return y
            }
        } else {
            return y
        }
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var evenNumbers = [Int]()
    for number in x...y {
        if number % 2 == 0 {
            evenNumbers.append(number)
        }
    }
    return evenNumbers.last ?? -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var evenNumbers = [Int]()
    for number in x...y {
        if number % 2 == 0 {
            evenNumbers.append(number)
        }
    }
    return evenNumbers.last ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x >= y {
        return -1
    } else {
        for i in x..<y {
            if i % 2 == 0 {
                return i
            }
        }
    }
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x >= y {
        return -1
    } else {
        for i in x..<y {
            if i % 2 == 0 {
                return i
            }
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x and y are positive numbers
    if x <= 0 || y <= 0 {
        return -1
    }
    // Check if x is even and return it if true
    if x % 2 == 0 {
        return x
    }
    // Check if y is even and return it if true
    if y % 2 == 0 {
        return y
    }
    // Check if x is greater than y and return it if true
    if x > y {
        return x
    }
    // Check if y is greater than x and return it if true
    if y > x {
        return y
    }
    // Return -1 if neither of the above conditions are met
    return -1
}

func sumArray(arr: [Int]) -> Int {
    // Initialize a variable to store the sum
    var sum = 0
    // Loop through each element in the array
    for i in arr {
        // Add the current element to the sum
        sum += i
    }
    // Return the sum
    return sum
}

func removeFirstLastChars(s: String) -> String {
    // Check if the string is empty
    if s.isEmpty {
        return s
    }
    // Return a new string with the first and last characters removed
    return s.substring(startIndex: 1, endIndex: s.count - 1)
}

func removeFirstLastCharsInArray(arr: [String]) -> [String] {
    // Initialize a new array to store the results
    var result = [String]()
    // Loop through each string in the array
    for i in arr {
        // Remove the first and last characters from the string and add it to the result array
        result.append(i.removeFirstLastChars())
    }
    // Return the result array
    return result
}

func removeVowels(s: String) -> String {
    // Initialize a new string to store the result
    var result = String()
    // Loop through each character in the string
    for i in s {
        // Check if the character is a vowel
        if i == 'a' || i == 'e' || i == 'i' || i == 'o' || i == 'u' {
            // If the character is a vowel, skip it
            continue
        }
        // Otherwise, add the character to the result string
        result += i
    }
    // Return the result string
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x and y are positive numbers
    if x <= 0 || y <= 0 {
        return -1
    }
    // Check if x is even and return it if true
    if x % 2 == 0 {
        return x
    }
    // Check if y is even and return it if true
    if y % 2 == 0 {
        return y
    }
    // Check if x is greater than y and return it if true
    if x > y {
        return x
    }
    // Check if y is greater than x and return it if true
    if y > x {
        return y
    }
    // Return -1 if neither of the above conditions are met
    return -1
}

// This function takes an array of integers and returns the sum of all the
// elements in the array.
// For example:
// sumArray([1, 2, 3, 4]) == 10
// sumArray([1, 2, 3, 4, 5]) == 15
func sumArray(arr: [Int]) -> Int {
    // Initialize a variable to store the sum
    var sum = 0
    // Loop through each element in the array
    for i in arr {
        // Add the current element to the sum
        sum += i
    }
    // Return the sum
    return sum
}

// This function takes a string and returns a new string with the first and last
// characters removed.
// For example:
// removeFirstLastChars("Hello") == "ell"
// removeFirstLastChars("World") == "orl"
func removeFirstLastChars(s: String) -> String {
    // Check if the string is empty
    if s.isEmpty {
        return s
    }
    // Return a new string with the first and last characters removed
    return s.substring(startIndex: 1, endIndex: s.count - 1)
}

// This function takes an array of strings and returns a new array with the
// first and last characters of each string removed.
// For example:
// removeFirstLastCharsInArray(["Hello", "World"]) == ["ell", "orl"]
// removeFirstLastCharsInArray(["Apple", "Banana"]) == ["ppl", "nana"]
func removeFirstLastCharsInArray(arr: [String]) -> [String] {
    // Initialize a new array to store the results
    var result = [String]()
    // Loop through each string in the array
    for i in arr {
        // Remove the first and last characters from the string and add it to the result array
        result.append(i.removeFirstLastChars())
    }
    // Return the result array
    return result
}

// This function takes a string and returns a new string with all the vowels
// removed.
// For example:
// removeVowels("Hello") == "Hll"
// removeVowels("World") == "Wrd"
func removeVowels(s: String) -> String {
    // Initialize a new string to store the result
    var result = String()
    // Loop through each character in the string
    for i in s {
        // Check if the character is a vowel
        if i == 'a' || i == 'e' || i == 'i' || i == 'o' || i == 'u' {
            // If the character is a vowel, skip it
            continue
        }
        // Otherwise, add the character to the result string
        result += i
    }
    // Return the result string
    return result
}

// This function takes a string and returns a new string with all the vowels
// removed.
// For example:
// removeVowels("Hello") == "Hll"
// removeVowels("World") == "Wrd"
func removeVowels(s: String) -> String {
    // Initialize a new string to store the result
    var result = String()
    // Loop through each character in the string
    for i in s {
        // Check if the character is a vowel
        if i == 'a' || i == 'e' || i == 'i' || i == 'o' || i == 'u' {
            // If the character is a vowel, skip it
            continue
        }
        // Otherwise, add the character to the result string
        result += i
    }
    // Return the result string
    return result
}

// This function takes a string and returns a new string with

func chooseNum(x: Int, y: Int) -> Int {
    let evens = [12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100]
    for i in evens {
        if i >= x && i <= y {
            return i
        }
    }
    return -1
}

func countDigits(x: Int) -> Int {
    var count = 0
    var temp = x
    while temp != 0 {
        temp = temp / 10
        count += 1
    }
    return count
}

func sumDigits(x: Int) -> Int {
    var sum = 0
    var temp = x
    while temp != 0 {
        var digit = temp % 10
        sum += digit
        temp = temp / 10
    }
    return sum
}

func powerSum(x: Int) -> Int {
    var sum = 0
    var temp = x
    var count = 0
    while temp != 0 {
        temp = temp / 10
        count += 1
    }
    temp = x
    while temp != 0 {
        var digit = temp % 10
        sum += digit * digit * digit * digit * digit * digit * digit * digit * digit * digit * digit
        temp = temp / 10
    }
    return sum
}

func sumOfPowers(x: Int) -> Int {
    var sum = 0
    var temp = x
    var count = 0
    while temp != 0 {
        temp = temp / 10
        count += 1
    }
    temp = x
    while temp != 0 {
        var digit = temp % 10
        sum += digit * digit * digit * digit * digit * digit * digit * digit * digit * digit * digit
        temp = temp / 10
    }
    return sum
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    let evens = [12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100]
    for i in evens {
        if i >= x && i <= y {
            return i
        }
    }
    return -1
}

// This function takes a positive integer x and returns the number of
// digits in x. For example:
// countDigits(x: 12345) == 5
// countDigits(x: 123) == 3
func countDigits(x: Int) -> Int {
    var count = 0
    var temp = x
    while temp != 0 {
        temp = temp / 10
        count += 1
    }
    return count
}

// This function takes a positive integer x and returns the sum of the
// digits in x. For example:
// sumDigits(x: 12345) == 15
// sumDigits(x: 123) == 6
func sumDigits(x: Int) -> Int {
    var sum = 0
    var temp = x
    while temp != 0 {
        var digit = temp % 10
        sum += digit
        temp = temp / 10
    }
    return sum
}

// This function takes a positive integer x and returns the sum of the
// digits in x raised to the power of the number of digits in x. For 
// example:
// powerSum(x: 12345) == 155
// powerSum(x: 123) == 19
func powerSum(x: Int) -> Int {
    var sum = 0
    var temp = x
    var count = 0
    while temp != 0 {
        temp = temp / 10
        count += 1
    }
    temp = x
    while temp != 0 {
        var digit = temp % 10
        sum += digit * digit * digit * digit * digit * digit * digit * digit * digit * digit * digit
        temp = temp / 10
    }
    return sum
}

// This function takes a positive integer x and returns the sum of the
// digits in x raised to the power of the number of digits in x. For 
// example:
// sumOfPowers(x: 12345) == 155
// sumOfPowers(x: 123) == 19
func sumOfPowers(x: Int) -> Int {
    var sum = 0
    var temp = x
    var count = 0
    while temp != 0 {
        temp = temp / 10
        count += 1
    }
    temp = x
    while temp != 0 {
        var digit = temp % 10
        sum += digit * digit * digit * digit * digit * digit * digit * digit * digit * digit * digit
        temp = temp / 10
    }
    return sum
}

// This function takes a positive integer x and returns the sum of the
// digits in x raised to the power of the number of digits in x. For 
// example:
// sumOfPowers(x: 12345) == 155
// sumOfPowers(x: 123) == 19
func sumOfPowers(x: Int) -> Int {
    var sum = 0
    var temp = x
    var count = 0
    while temp != 0 {
        temp = temp / 10
        count += 1
    }
    temp = x
    while temp != 0 {
        var digit = temp % 10
        sum += digit * digit * digit * digit *

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is even
    if x % 2 == 0 {
        // If x is even, check if it's in the range [x, y]
        if x <= y {
            // If x is in the range, return it
            return x
        } else {
            // If x is not in the range, return -1
            return -1
        }
    } else {
        // If x is odd, check if it's in the range [x + 1, y]
        if x + 1 <= y {
            // If x + 1 is in the range, return it
            return x + 1
        } else {
            // If x + 1 is not in the range, return -1
            return -1
        }
    }
}

func sumArray(arr: [Int]) -> Int {
    // Initialize a variable to store the sum
    var sum = 0
    // Iterate over each element in the array
    for num in arr {
        // Add the current element to the sum
        sum += num
    }
    // Return the sum
    return sum
}

func maxArray(arr: [Int]) -> Int {
    // Initialize a variable to store the maximum value
    var max = arr[0]
    // Iterate over each element in the array
    for num in arr {
        // If the current element is greater than the maximum value, update the maximum value
        if num > max {
            max = num
        }
    }
    // Return the maximum value
    return max
}

func removeEven(arr: [Int]) -> [Int] {
    // Initialize a new array to store the even numbers
    var evenArr: [Int] = []
    // Iterate over each element in the array
    for num in arr {
        // If the current element is even, add it to the new array
        if num % 2 == 0 {
            evenArr.append(num)
        }
    }
    // Return the new array
    return evenArr
}

func removeOdd(arr: [Int]) -> [Int] {
    // Initialize a new array to store the odd numbers
    var oddArr: [Int] = []
    // Iterate over each element in the array
    for num in arr {
        // If the current element is odd, add it to the new array
        if num % 2 != 0 {
            oddArr.append(num)
        }
    }
    // Return the new array
    return oddArr
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x is even
    if x % 2 == 0 {
        // If x is even, check if it's in the range [x, y]
        if x <= y {
            // If x is in the range, return it
            return x
        } else {
            // If x is not in the range, return -1
            return -1
        }
    } else {
        // If x is odd, check if it's in the range [x + 1, y]
        if x + 1 <= y {
            // If x + 1 is in the range, return it
            return x + 1
        } else {
            // If x + 1 is not in the range, return -1
            return -1
        }
    }
}

// This function takes an array of integers and returns the sum of all the
// elements in the array.
// For example:
// sumArray([1, 2, 3, 4, 5]) == 15
// sumArray([1, -2, 3, -4, 5]) == 3
func sumArray(arr: [Int]) -> Int {
    // Initialize a variable to store the sum
    var sum = 0
    // Iterate over each element in the array
    for num in arr {
        // Add the current element to the sum
        sum += num
    }
    // Return the sum
    return sum
}

// This function takes an array of integers and returns the maximum value in the array.
// For example:
// maxArray([1, 2, 3, 4, 5]) == 5
// maxArray([1, -2, 3, -4, 5]) == 5
func maxArray(arr: [Int]) -> Int {
    // Initialize a variable to store the maximum value
    var max = arr[0]
    // Iterate over each element in the array
    for num in arr {
        // If the current element is greater than the maximum value, update the maximum value
        if num > max {
            max = num
        }
    }
    // Return the maximum value
    return max
}

// This function takes an array of integers and returns a new array with all the even
// numbers removed.
// For example:
// removeEven([1, 2, 3, 4, 5]) == [1, 3, 5]
// removeEven([1, -2, 3, -4, 5]) == [1, 3]
func removeEven(arr: [Int]) -> [Int] {
    // Initialize a new array to store the even numbers
    var evenArr: [Int] = []
    // Iterate over each element in the array
    for num in arr {
        // If the current element is even, add it to the new array
        if num % 2 == 0 {
            evenArr.append(num)
        }
    }
    // Return the new array
    return evenArr
}

// This function takes an array of integers and returns a new array with all the odd
// numbers removed.
// For example:
// removeOdd([1, 2, 3, 4, 5]) == [2, 4]
// removeOdd([1, -2, 3, -4, 5]) == [1, 3, 5]
func removeOdd(arr: [Int]) -> [Int] {
    // Initialize a new array to store the odd numbers
    var oddArr: [Int] = []
    // Iterate over each element in the array
    for num in arr {
        // If the current element is odd, add it to the new array
        if num % 2 != 0 {
            oddArr.append(num)
        }
    }
    // Return the new array
    return oddArr
}

// This function takes an array of integers and returns a new array with all the
// negative numbers removed.
// For example:
// removeNegative([1, 2, 3, 4, 5]) == [1, 2, 3, 4, 5]
// removeNegative([1, -2, 3, -4, 5]) == [1, 3, 5]
func removeNegative(arr: [Int]) -> [Int] {
    // Initialize a new array to store the negative numbers
    var negArr: [Int] = []
    // Iterate

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x..y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

func countDigits(n: Int) -> Int {
    var count = 0
    var num = n
    while num > 0 {
        num /= 10
        count += 1
    }
    return count
}

func sumDigits(n: Int) -> Int {
    var sum = 0
    var num = n
    while num > 0 {
        var digit = num % 10
        sum += digit
        num /= 10
    }
    return sum
}

func countEvenDigits(n: Int) -> Int {
    var count = 0
    var num = n
    while num > 0 {
        var digit = num % 10
        if digit % 2 == 0 {
            count += 1
        }
        num /= 10
    }
    return count
}

func countOddDigits(n: Int) -> Int {
    var count = 0
    var num = n
    while num > 0 {
        var digit = num % 10
        if digit % 2 != 0 {
            count += 1
        }
        num /= 10
    }
    return count
}

func countPrimeDigits(n: Int) -> Int {
    var count = 0
    var num = n
    while num > 0 {
        var digit = num % 10
        if isPrime(digit) {
            count += 1
        }
        num /= 10
    }
    return count
}

func isPrime(n: Int) -> Bool {
    if n <= 1 {
        return false
    }
    for i in 2..Int(sqrt(n)) {
        if n % i == 0 {
            return false
        }
    }
    return true
}

func isPerfect(n: Int) -> Bool {
    var sum = 0
    for i in 1..Int(sqrt(n)) {
        if n % i == 0 {
            sum += i
        }
    }
    return sum == n
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x..y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

// This function takes a positive integer n and returns the number of
// digits in n. For example:
// countDigits(n: 12345) == 5
// countDigits(n: 123) == 3
func countDigits(n: Int) -> Int {
    var count = 0
    var num = n
    while num > 0 {
        num /= 10
        count += 1
    }
    return count
}

// This function takes a positive integer n and returns the sum of the
// digits in n. For example:
// sumDigits(n: 12345) == 15
// sumDigits(n: 123) == 6
func sumDigits(n: Int) -> Int {
    var sum = 0
    var num = n
    while num > 0 {
        var digit = num % 10
        sum += digit
        num /= 10
    }
    return sum
}

// This function takes a positive integer n and returns the number of
// digits in n that are even. For example:
// countEvenDigits(n: 12345) == 3
// countEvenDigits(n: 123) == 1
func countEvenDigits(n: Int) -> Int {
    var count = 0
    var num = n
    while num > 0 {
        var digit = num % 10
        if digit % 2 == 0 {
            count += 1
        }
        num /= 10
    }
    return count
}

// This function takes a positive integer n and returns the number of
// digits in n that are odd. For example:
// countOddDigits(n: 12345) == 2
// countOddDigits(n: 123) == 2
func countOddDigits(n: Int) -> Int {
    var count = 0
    var num = n
    while num > 0 {
        var digit = num % 10
        if digit % 2 != 0 {
            count += 1
        }
        num /= 10
    }
    return count
}

// This function takes a positive integer n and returns the number of
// digits in n that are prime. For example:
// countPrimeDigits(n: 12345) == 2
// countPrimeDigits(n: 123) == 2
func countPrimeDigits(n: Int) -> Int {
    var count = 0
    var num = n
    while num > 0 {
        var digit = num % 10
        if isPrime(digit) {
            count += 1
        }
        num /= 10
    }
    return count
}

// This function takes a positive integer n and returns true if n is
// prime, and false otherwise. For example:
// isPrime(n: 1) == false
// isPrime(n: 2) == true
// isPrime(n: 3) == true
// isPrime(n: 4) == false
func isPrime(n: Int) -> Bool {
    if n <= 1 {
        return false
    }
    for i in 2..Int(sqrt(n)) {
        if n % i == 0 {
            return false
        }
    }
    return true
}

// This function takes a positive integer n and returns true if n is
// perfect, and false otherwise. For example:
// isPerfect(n: 1) == false
// isPerfect(n: 2) == false
// isPerfect(n: 3) == false
// isPerfect(n: 6) == true
// isPerfect(n: 28) == true
// isPerfect(n: 496) == true
// isPerfect(n: 8128) == true
func isPerfect(n: Int) -> Bool {
    var sum = 0
    for i in 1..Int(sqrt(n)) {
        if n % i == 0 {
            sum += i
        }
    }
    return sum == n
}

// This function takes a positive

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else if x % 2 == 1 && y % 2 == 1 {
        return -1
    } else {
        if x > y {
            return x - 1
        } else {
            return y - 1
        }
    }
}

func sum(numbers: [Int]) -> Int {
    var sum: Int = 0
    for i in 0..<numbers.count {
        sum += numbers[i]
    }
    return sum
}

func average(numbers: [Int]) -> Double {
    return sum(numbers) / Double(numbers.count)
}

func smallest(numbers: [Int]) -> Int {
    var smallest: Int = numbers[0]
    for i in 1..<numbers.count {
        if numbers[i] < smallest {
            smallest = numbers[i]
        }
    }
    return smallest
}

func largest(numbers: [Int]) -> Int {
    var largest: Int = numbers[0]
    for i in 1..<numbers.count {
        if numbers[i] > largest {
            largest = numbers[i]
        }
    }
    return largest
}

func secondLargest(numbers: [Int]) -> Int {
    var largest: Int = numbers[0]
    var secondLargest: Int = -1
    for i in 1..<numbers.count {
        if numbers[i] > largest {
            secondLargest = largest
            largest = numbers[i]
        } else if numbers[i] > secondLargest && numbers[i] != largest {
            secondLargest = numbers[i]
        }
    }
    return secondLargest
}

func secondSmallest(numbers: [Int]) -> Int {
    var smallest: Int = numbers[0]
    var secondSmallest: Int = -1
    for i in 1..<numbers.count {
        if numbers[i] < smallest {
            secondSmallest = smallest
            smallest = numbers[i]
        } else if numbers[i] < secondSmallest && numbers[i] != smallest {
            secondSmallest = numbers[i]
        }
    }
    return secondSmallest
}

func evenCount(numbers: [Int]) -> Int {
    var count: Int = 0
    for i in 0..<numbers.count {
        if numbers[i] % 2 == 0 {
            count += 1
        }
    }
    return count
}

func oddCount(numbers: [Int]) -> Int {
    var count: Int = 0
    for i in 0..<numbers.count {
        if numbers[i] % 2 == 1 {
            count += 1
        }
    }
    return count
}

func primeCount(numbers: [Int]) -> Int {
    var count: Int = 0
    for i in 0..<numbers.count {
        if isPrime(numbers[i]) {
            count += 1
        }
    }
    return count
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else if x % 2 == 1 && y % 2 == 1 {
        return -1
    } else {
        if x > y {
            return x - 1
        } else {
            return y - 1
        }
    }
}

// This function takes an array of numbers and returns the sum of the
// numbers in the array.
func sum(numbers: [Int]) -> Int {
    var sum: Int = 0
    for i in 0..<numbers.count {
        sum += numbers[i]
    }
    return sum
}

// This function takes an array of numbers and returns the average of the
// numbers in the array.
func average(numbers: [Int]) -> Double {
    return sum(numbers) / Double(numbers.count)
}

// This function takes an array of numbers and returns the smallest number
// in the array.
func smallest(numbers: [Int]) -> Int {
    var smallest: Int = numbers[0]
    for i in 1..<numbers.count {
        if numbers[i] < smallest {
            smallest = numbers[i]
        }
    }
    return smallest
}

// This function takes an array of numbers and returns the largest number
// in the array.
func largest(numbers: [Int]) -> Int {
    var largest: Int = numbers[0]
    for i in 1..<numbers.count {
        if numbers[i] > largest {
            largest = numbers[i]
        }
    }
    return largest
}

// This function takes an array of numbers and returns the second largest
// number in the array. If there's no second largest number, then the
// function should return -1.
func secondLargest(numbers: [Int]) -> Int {
    var largest: Int = numbers[0]
    var secondLargest: Int = -1
    for i in 1..<numbers.count {
        if numbers[i] > largest {
            secondLargest = largest
            largest = numbers[i]
        } else if numbers[i] > secondLargest && numbers[i] != largest {
            secondLargest = numbers[i]
        }
    }
    return secondLargest
}

// This function takes an array of numbers and returns the second smallest
// number in the array. If there's no second smallest number, then the
// function should return -1.
func secondSmallest(numbers: [Int]) -> Int {
    var smallest: Int = numbers[0]
    var secondSmallest: Int = -1
    for i in 1..<numbers.count {
        if numbers[i] < smallest {
            secondSmallest = smallest
            smallest = numbers[i]
        } else if numbers[i] < secondSmallest && numbers[i] != smallest {
            secondSmallest = numbers[i]
        }
    }
    return secondSmallest
}

// This function takes an array of numbers and returns the number of
// even numbers in the array.
func evenCount(numbers: [Int]) -> Int {
    var count: Int = 0
    for i in 0..<numbers.count {
        if numbers[i] % 2 == 0 {
            count += 1
        }
    }
    return count
}

// This function takes an array of numbers and returns the number of
// odd numbers in the array.
func oddCount(numbers: [Int]) -> Int {
    var count: Int = 0
    for i in 0..<numbers.count {
        if numbers[i] % 2 == 1 {
            count += 1
        }
    }
    return count
}

// This function takes an array of numbers and returns the number of
// prime numbers in the array. A prime number is a number that is
// divisible only by 1 and itself.
func primeCount(numbers: [Int]) -> Int {
    var count: Int = 0
    for i in 0..<numbers.count {
        if isPrime(numbers[i]) {
            count += 1
        }
    }
    return count
}

// This function takes a number and returns true if the number is prime,
// and false otherwise.
func isPrime(number: Int) -> Bool {
    if number <= 1 {
        return false
    }
    for

func chooseNum(x: Int, y: Int) -> Int {
    var result: Int = -1
    for i in x..y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

func replaceLetter(s: String) -> String {
    var result: String = ""
    for i in 0..<s.length {
        if s[i] == 'a' {
            result += 'e'
        } else {
            result += s[i]
        }
    }
    return result
}

func replaceLetter(s: String) -> String {
    var result: String = ""
    for i in 0..<s.length {
        if s[i] == 'a' {
            result += 'e'
        } else if s[i] == 'b' {
            result += 'f'
        } else {
            result += s[i]
        }
    }
    return result
}

func replaceLetter(s: String) -> String {
    var result: String = ""
    for i in 0..<s.length {
        if s[i] == 'a' {
            result += 'e'
        } else if s[i] == 'b' {
            result += 'f'
        } else if s[i] == 'c' {
            result += 'g'
        } else {
            result += s[i]
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result: Int = -1
    for i in x..y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

// This function takes a string and returns a new string that is the same
// as the input string except that all occurrences of the letter 'a' are
// replaced with 'e'. For example:
// replaceLetter('apple') == 'apple'
// replaceLetter('banana') == 'banana'
// replaceLetter('apple and banana') == 'apple and banana'
// replaceLetter('apple and a banana') == 'apple and e banana'
// replaceLetter('apple and a bAnana') == 'apple and a bAnana'
func replaceLetter(s: String) -> String {
    var result: String = ""
    for i in 0..<s.length {
        if s[i] == 'a' {
            result += 'e'
        } else {
            result += s[i]
        }
    }
    return result
}

// This function takes a string and returns a new string that is the same
// as the input string except that all occurrences of the letter 'a' are
// replaced with 'e' and all occurrences of the letter 'b' are replaced with
// 'f'. For example:
// replaceLetter('apple') == 'apple'
// replaceLetter('banana') == 'banana'
// replaceLetter('apple and banana') == 'apple and banana'
// replaceLetter('apple and a banana') == 'apple and e banana'
// replaceLetter('apple and a bAnana') == 'apple and a bAnana'
func replaceLetter(s: String) -> String {
    var result: String = ""
    for i in 0..<s.length {
        if s[i] == 'a' {
            result += 'e'
        } else if s[i] == 'b' {
            result += 'f'
        } else {
            result += s[i]
        }
    }
    return result
}

// This function takes a string and returns a new string that is the same
// as the input string except that all occurrences of the letter 'a' are
// replaced with 'e' and all occurrences of the letter 'b' are replaced with
// 'f' and all occurrences of the letter 'c' are replaced with 'g'. For
// example:
// replaceLetter('apple') == 'apple'
// replaceLetter('banana') == 'banana'
// replaceLetter('apple and banana') == 'apple and banana'
// replaceLetter('apple and a banana') == 'apple and e banana'
// replaceLetter('apple and a bAnana') == 'apple and a bAnana'
func replaceLetter(s: String) -> String {
    var result: String = ""
    for i in 0..<s.length {
        if s[i] == 'a' {
            result += 'e'
        } else if s[i] == 'b' {
            result += 'f'
        } else if s[i] == 'c' {
            result += 'g'
        } else {
            result += s[i]
        }
    }
    return result
}

// This function takes a string and returns a new string that is the same
// as the input string except that all occurrences of the letter 'a' are
// replaced with 'e', all occurrences of the letter 'b' are replaced with
// 'f', all occurrences of the letter 'c' are replaced with 'g', and all
// occurrences of the letter 'd' are replaced with 'h'. For example:
// replaceLetter('apple') == 'apple'
// replaceLetter('banana') == 'banana'
// replaceLetter('apple and banana') == 'apple and banana'
// replaceLetter('apple and a banana') == 'apple and e banana'
// replaceLetter('apple and a bAnana') == 'apple and a bAnana'
func replaceLetter(s: String) -> String {
    var result: String = ""
    for i in 0..<s.length {
        if s[i] == 'a' {
            result += 'e'
        } else if s[i] == 'b' {
            result += 'f'
        } else if s[i] == 'c' {
            result += 'g'
        } else if s[i] == 'd' {
            result += 'h'

func chooseNum(x: Int, y: Int) -> Int {
    let evens = [1, 2, 4, 6, 8, 10, 12]
    let range = x..y
    for i in range {
        if evens.contains(i) {
            return i
        }
    }
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    let evens = [1, 2, 4, 6, 8, 10, 12]
    let range = x..y
    for i in range {
        if evens.contains(i) {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let evens = [1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20];
    let min = min(x, y);
    let max = max(x, y);
    for i in min ..= max {
        if evens.contains(i) {
            return i;
        }
    }
    return -1;
}

func countDigits(x: Int) -> Int {
    var count = 0;
    while x > 0 {
        x = x / 10;
        count = count + 1;
    }
    return count;
}

func sumDigits(x: Int) -> Int {
    var sum = 0;
    while x > 0 {
        var digit = x % 10;
        sum = sum + digit;
        x = x / 10;
    }
    return sum;
}

func countDivisions(x: Int) -> Int {
    var count = 0;
    while x > 1 {
        x = x / 2;
        count = count + 1;
    }
    return count;
}

func countDivisionsBy3(x: Int) -> Int {
    var count = 0;
    while x > 1 {
        x = x / 3;
        count = count + 1;
    }
    return count;
}

func countDivisionsBy5(x: Int) -> Int {
    var count = 0;
    while x > 1 {
        x = x / 5;
        count = count + 1;
    }
    return count;
}

func countDivisionsBy3or5(x: Int) -> Int {
    var count = 0;
    while x > 1 {
        if x % 3 == 0 {
            x = x / 3;
        }
        if x % 5 == 0 {
            x = x / 5;
        }
        count = count + 1;
    }
    return count;
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    let evens = [1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20];
    let min = min(x, y);
    let max = max(x, y);
    for i in min ..= max {
        if evens.contains(i) {
            return i;
        }
    }
    return -1;
}

// This function takes a positive integer x and returns the number of 
// digits in x.
// For example:
// countDigits(x: 12345) == 5
// countDigits(x: 123) == 3
func countDigits(x: Int) -> Int {
    var count = 0;
    while x > 0 {
        x = x / 10;
        count = count + 1;
    }
    return count;
}

// This function takes a positive integer x and returns the sum of its 
// digits.
// For example:
// sumDigits(x: 12345) == 15
// sumDigits(x: 123) == 6
func sumDigits(x: Int) -> Int {
    var sum = 0;
    while x > 0 {
        var digit = x % 10;
        sum = sum + digit;
        x = x / 10;
    }
    return sum;
}

// This function takes a positive integer x and returns the number of 
// times x can be divided by 2 before it becomes 1.
// For example:
// countDivisions(x: 3) == 2
// countDivisions(x: 4) == 2
func countDivisions(x: Int) -> Int {
    var count = 0;
    while x > 1 {
        x = x / 2;
        count = count + 1;
    }
    return count;
}

// This function takes a positive integer x and returns the number of 
// times x can be divided by 3 before it becomes 1.
// For example:
// countDivisions(x: 3) == 2
// countDivisions(x: 4) == 2
func countDivisionsBy3(x: Int) -> Int {
    var count = 0;
    while x > 1 {
        x = x / 3;
        count = count + 1;
    }
    return count;
}

// This function takes a positive integer x and returns the number of 
// times x can be divided by 5 before it becomes 1.
// For example:
// countDivisions(x: 3) == 2
// countDivisions(x: 4) == 2
func countDivisionsBy5(x: Int) -> Int {
    var count = 0;
    while x > 1 {
        x = x / 5;
        count = count + 1;
    }
    return count;
}

// This function takes a positive integer x and returns the number of 
// times x can be divided by 5 or 3 before it becomes 1.
// For example:
// countDivisions(x: 3) == 2
// countDivisions(x: 4) == 2
func countDivisionsBy3or5(x: Int) -> Int {
    var count = 0;
    while x > 1 {
        if x % 3 == 0 {
            x = x / 3;
        }
        if x % 5 == 0 {
            x = x / 5;
        }
        count = count + 1;
    }
    return count;
}

// This function takes a positive integer x and returns the number of 
// times x can be divided by 2, 3, or 5 before it becomes 1.
// For example:
// countDivisions(x: 3) == 2
// countDivisions(x: 4) == 2
func countDivisionsBy23or5(x: Int) -> Int {
    var count = 0;
    while x > 1 {
        if x % 2 == 0 {
            x = x / 2;
        }
        if x % 3 == 0 {
            x = x /

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        return -1
    }
}

// This function takes two positive numbers x and y and returns the
// biggest

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if x > y {
        return -1
    }
    return y - (y - x) % 2
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if x > y {
        return -1
    }
    return y - (y - x) % 2
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    if x > y {
        return -1
    }
    
    return y - (y - x) % 2
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    if x > y {
        return -1
    }
    
    return y - (y - x) % 2
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if y % 2 == 1 {
        y -= 1
    }
    if x > y {
        return -1
    }
    return max(x, y)
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if y % 2 == 1 {
        y -= 1
    }
    if x > y {
        return -1
    }
    return max(x, y)
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    
    for i in stride(from: x, through: y, by: 2) {
        return i
    }
    
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    
    for i in stride(from: x, through: y, by: 2) {
        return i
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    for num in stride(from: x, through: y, by: 2) {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    for num in stride(from: x, through: y, by: 2) {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    
    for num in stride(from: y, to: x - 1, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    
    for num in stride(from: y, to: x - 1, by: -1) {
        if num % 2 == 0 {
            return num
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    for num in stride(from: x, through: y, by: 2) {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    for num in stride(from: x, through: y, by: 2) {
        if num % 2 == 0 {
            return num
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    }
    return max(x, y)
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if y % 2 != 0 {
        y -= 1
    }
    if x > y {
        return -1
    }
    return max(x, y)
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    for i in stride(from: y, to: x - 1, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    for i in stride(from: y, to: x - 1, by: -2) {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if x > y {
        return -1
    }
    return y - (y - x) % 2
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    if x > y {
        return -1
    }
    return y - (y - x) % 2
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    if y % 2 == 1 {
        y -= 1
    }
    
    if x > y {
        return -1
    } else {
        return y
    }
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    if y % 2 == 1 {
        y -= 1
    }
    
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    
    if y % 2 != 0 {
        y -= 1
    }
    
    if x > y {
        return -1
    } else {
        return y
    }
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    
    if y % 2 != 0 {
        y -= 1
    }
    
    if x > y {
        return -1
    } else {
        return y
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    while x <= y {
        if x % 2 == 0 {
            return x
        }
        x += 1
    }
    
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    while x <= y {
        if x % 2 == 0 {
            return x
        }
        x += 1
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    
    for i in stride(from: x, through: y, by: 2) {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    
    for i in stride(from: x, through: y, by: 2) {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, to: x - 1, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, to: x - 1, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    
    for i in stride(from: x, through: y, by: 2) {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 != 0 {
        x += 1
    }
    
    for i in stride(from: x, through: y, by: 2) {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, through: x, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: y, through: x, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    for i in stride(from: y, to: x - 1, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    
    for i in stride(from: y, to: x - 1, by: -1) {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: y, through: x, by: -1) {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: y, through: x, by: -1) {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: y, through: x, by: -1) {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

<start_of_turn>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<end_of_turn>
<start_of_turn>model
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in stride(from: y, through: x, by: -1) {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, through: y, by: 2) {
        return i
    }
    return -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, through: y, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, through: y, by: 2) {
        return i
    }
    return -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    }
    for i in stride(from: x, through: y, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x and y are positive
    guard x > 0 && y > 0 else {
        return -1
    }

    // Find the biggest even integer in the range [x, y]
    var current = x
    while current <= y {
        if current.isMultiple(of: 2) {
            return current
        }
        current += 1
    }

    // If no even integer is found, return -1
    return -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x and y are positive
    guard x > 0 && y > 0 else {
        return -1
    }

    // Find the biggest even integer in the range [x, y]
    var current = x
    while current <= y {
        if current.isMultiple(of: 2) {
            return current
        }
        current += 1
    }

    // If no even integer is found, return -1
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}

[INST] Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1 [/INST] ```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else { return -1 }
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max() ?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        return max(x, y)
    } else {
        return -1
    }
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        return max(x, y)
    } else {
        return -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, through: y, by: 2) {
            return i
        }
        return -1
    }
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, through: y, by: 2) {
            return i
        }
        return -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        return max(x, y)
    } else {
        for i in stride(from: x, to: y, by: 2) {
            return i
        }
        return -1
    }
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        return max(x, y)
    } else {
        for i in stride(from: x, to: y, by: 2) {
            return i
        }
        return -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        return max(x, y)
    } else {
        return -1
    }
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 && y % 2 == 0 {
        return max(x, y)
    } else {
        return -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    for i in stride(from: x, to: y, by: 2) {
        return i
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in x...y {
            if i % 2 == 0 {
                return i
            }
        }
        return -1
    }
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 0 {
        return x
    } else if y % 2 == 0 {
        return y
    } else {
        for i in x...y {
            if i % 2 == 0 {
                return i
            }
        }
        return -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    let biggestEven = evenNumbers.max()
    
    return biggestEven?? -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    let biggestEven = evenNumbers.max()
    
    return biggestEven?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    let biggestEvenNumber = evenNumbers.max()
    
    return biggestEvenNumber?? -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    let biggestEvenNumber = evenNumbers.max()
    
    return biggestEvenNumber?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for num in stride(from: x, to: y + 1, by: 2) {
        return num
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for num in stride(from: x, to: y + 1, by: 2) {
        return num
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    var result = -1
    
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    
    return result
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    var result = -1
    
    for i in x...y {
        if i % 2 == 0 {
            result = i
        }
    }
    
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max()?? -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.max()?? -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    let start = x % 2 == 0? x : x + 1
    let end = y % 2 == 0? y : y - 1
    
    for i in stride(from: start, to: end + 1, by: 2) {
        return i
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    let start = x % 2 == 0? x : x + 1
    let end = y % 2 == 0? y : y - 1
    
    for i in stride(from: start, to: end + 1, by: 2) {
        return i
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    for i in stride(from: x, to: y + 1, by: 2) {
        return i
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else {
        return -1
    }
    
    for num in stride(from: x, to: y + 1, by: 2) {
        return num
    }
    
    return -1
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0 && y > 0 else {
        return -1
    }
    
    for num in stride(from: x, to: y + 1, by: 2) {
        return num
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    var maxEven = -1
    
    for num in x...y {
        if num % 2 == 0 {
            maxEven = num
        }
    }
    
    return maxEven
}

Question:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1

Answer:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    guard x > 0, y > 0 else {
        return -1
    }
    
    var maxEven = -1
    
    for num in x...y {
        if num % 2 == 0 {
            maxEven = num
        }
    }
    
    return maxEven
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    let range = x...y
    let evenNumbers = range.filter { $0 % 2 == 0 }
    return evenNumbers.isEmpty ? -1 : evenNumbers.max()!
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var num = y
    while num >= x {
        if num % 2 == 0 {
            return num
        }
        num -= 1
    }
    return -1
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var num = y
    while num >= x {
        if num % 2 == 0 {
            return num
        }
        num -= 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = x
    while i <= y {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    return -1
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = x
    while i <= y {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = y
    while i >= x {
        if i % 2 == 0 {
            return i
        }
        i -= 1
    }
    return -1
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = y
    while i >= x {
        if i % 2 == 0 {
            return i
        }
        i -= 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var num = y
    while num >= x {
        if num % 2 == 0 {
            return num
        }
        num -= 1
    }
    return -1
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var num = y
    while num >= x {
        if num % 2 == 0 {
            return num
        }
        num -= 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var num = y
    while num >= x {
        if num % 2 == 0 {
            return num
        }
        num -= 1
    }
    return -1
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var num = y
    while num >= x {
        if num % 2 == 0 {
            return num
        }
        num -= 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = y
    while i >= x {
        if i % 2 == 0 {
            return i
        }
        i -= 1
    }
    return -1
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = y
    while i >= x {
        if i % 2 == 0 {
            return i
        }
        i -= 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = x
    while i <= y {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    return -1
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = x
    while i <= y {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = x
    while i <= y {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    return -1
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = x
    while i <= y {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = x
    while i <= y {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    return -1
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var i = x
    while i <= y {
        if i % 2 == 0 {
            return i
        }
        i += 1
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = y
    while maxNum % 2 != 0 {
        maxNum -= 1
    }
    return maxNum
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = y
    while maxNum % 2 != 0 {
        maxNum -= 1
    }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in max(x, y):
        if i % 2 == 0 && i >= x && i <= y {
            maxNum = i
        }
    return maxNum
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in max(x, y):
        if i % 2 == 0 && i >= x && i <= y {
            maxNum = i
        }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxNum {
            maxNum = i
        }
    }
    return maxNum
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxNum {
            maxNum = i
        }
    }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = y
    if y % 2 == 0 {
        while result > x && result % 2 != 0 {
            result -= 1
        }
    } else {
        while result > x && result % 2 == 0 {
            result -= 1
        }
    }
    if result < x {
        return -1
    } else {
        return result
    }
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = y
    if y % 2 == 0 {
        while result > x && result % 2 != 0 {
            result -= 1
        }
    } else {
        while result > x && result % 2 == 0 {
            result -= 1
        }
    }
    if result < x {
        return -1
    } else {
        return result
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in stride(from: x, through: y, by: 2) {
        if i > maxNum {
            maxNum = i
        }
    }
    return maxNum
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxNum = -1
    for i in stride(from: x, through: y, by: 2) {
        if i > maxNum {
            maxNum = i
        }
    }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxNum {
            maxNum = i
        }
    }
    return maxNum
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxNum {
            maxNum = i
        }
    }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxNum {
            maxNum = i
        }
    }
    return maxNum
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var maxNum = -1
    for i in x..<y {
        if i % 2 == 0 && i > maxNum {
            maxNum = i
        }
    }
    return maxNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = y
    if y % 2 != 0 {
        result -= 1
    }
    if result < x {
        result = -1
    }
    return result
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = y
    if y % 2 != 0 {
        result -= 1
    }
    if result < x {
        result = -1
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var max = -1
    for i in x..<y {
        if i % 2 == 0 && i > max {
            max = i
        }
    }
    return max
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x > y {
        return -1
    }
    var max = -1
    for i in x..<y {
        if i % 2 == 0 && i > max {
            max = i
        }
    }
    return max
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = y
    if y % 2 != 0 {
        result -= 1
    }
    if result < x || result % 2 != 0 {
        result = x
    }
    if result < x {
        return -1
    }
    return result
}

You are an AI programming assistant, utilizing the Deepseek Coder model, developed by Deepseek Company, and you only answer questions related to computer science. For politically sensitive questions, security and privacy issues, and other non-computer science questions, you will refuse to answer
### Instruction:
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1
### Response:
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var result = y
    if y % 2 != 0 {
        result -= 1
    }
    if result < x || result % 2 != 0 {
        result = x
    }
    if result < x {
        return -1
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Write your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code goes here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code goes here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code goes here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code goes here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    let max = max(x, y)
    let min = min(x, y)
    
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // TODO: Implement this function
    var result = -1
    if x % 2 == 0 && x >= y {
        result = x
    } else if y % 2 == 0 && y >= x {
        result = y
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // TODO: Implement this function
    var result = -1
    if x % 2 == 0 && x >= y {
        result = x
    } else if y % 2 == 0 && y >= x {
        result = y
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // TODO: Implement this function
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // TODO: Implement this function
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // TODO: Implement this function
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // TODO: Implement this function
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // TODO: implement this function
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // TODO: implement this function
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result: Int = -1
    if x % 2 == 0 && x <= y {
        result = x
    } else if y % 2 == 0 && x >= y {
        result = y
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result: Int = -1
    if x % 2 == 0 && x <= y {
        result = x
    } else if y % 2 == 0 && x >= y {
        result = y
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    let min = min(x, y)
    let max = max(x, y)
    
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    let min = min(x, y)
    let max = max(x, y)
    
    for i in min...max {
        if i % 2 == 0 {
            return i
        }
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var result: Int = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var result: Int = -1
    for i in x...y {
        if i % 2 == 0 {
            result = i
            break
        }
    }
    return result
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var max: Int = -1
    for i in x...y {
        if i % 2 == 0 {
            max = i
        }
    }
    return max
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    var max: Int = -1
    for i in x...y {
        if i % 2 == 0 {
            max = i
        }
    }
    return max
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x <= y && y % 2 == 0 {
        return y
    } else if x <= y && x % 2 == 0 {
        return x
    } else {
        return -1
    }
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x <= y && y % 2 == 0 {
        return y
    } else if x <= y && x % 2 == 0 {
        return x
    } else {
        return -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x > y {
        return -1
    }
    while x <= y {
        if x % 2 == 0 {
            return x
        }
        x += 2
    }
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x > y {
        return -1
    }
    while x <= y {
        if x % 2 == 0 {
            return x
        }
        x += 2
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x <= y && y % 2 == 0 {
        return y
    } else if x <= y && x % 2 == 0 {
        return x
    } else {
        return -1
    }
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x <= y && y % 2 == 0 {
        return y
    } else if x <= y && x % 2 == 0 {
        return x
    } else {
        return -1
    }
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    return maxEvenNum
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x > y {
        return -1
    }
    while x <= y {
        if x % 2 == 0 {
            return x
        }
        x += 2
    }
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x > y {
        return -1
    }
    while x <= y {
        if x % 2 == 0 {
            return x
        }
        x += 2
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2!= 0 {
        x = x + 1
    }
    if x > y {
        return -1
    }
    
    var currentNum = x
    while currentNum <= y {
        if currentNum % 2 == 0 {
            return currentNum
        }
        currentNum += 2
    }
    
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2!= 0 {
        x = x + 1
    }
    if x > y {
        return -1
    }
    
    var currentNum = x
    while currentNum <= y {
        if currentNum % 2 == 0 {
            return currentNum
        }
        currentNum += 2
    }
    
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x <= y && y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, through: y, by: 2) {
            if i % 2 == 0 {
                return i
            }
        }
    }
    return -1
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    if x <= y && y % 2 == 0 {
        return y
    } else {
        for i in stride(from: x, through: y, by: 2) {
            if i % 2 == 0 {
                return i
            }
        }
    }
    return -1
}
```

func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    return maxEvenNum
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    if x % 2 == 1 {
        x += 1
    }
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 2) {
        if num > maxEvenNum {
            maxEvenNum = num
        }
    }
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 1) {
        if num % 2 == 0 {
            if maxEvenNum < num {
                maxEvenNum = num
            }
        }
    }
    return maxEvenNum
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 1) {
        if num % 2 == 0 {
            if maxEvenNum < num {
                maxEvenNum = num
            }
        }
    }
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 1) {
        if num % 2 == 0 {
            if maxEvenNum < num {
                maxEvenNum = num
            }
        }
    }
    return maxEvenNum
}

<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Write code in Swift programming language. Don't include usage examples or tests.
This function takes two positive numbers x and y and returns the
biggest even integer number that is in the range [x, y] inclusive. If 
there's no such number, then the function should return -1.
For example:
chooseNum(x: 12, y: 15) == 14
chooseNum(x: 13, y: 12) == -1<|im_end|>
<|im_start|>assistant
```swift
func chooseNum(x: Int, y: Int) -> Int {
    var maxEvenNum = -1
    for num in stride(from: x, through: y, by: 1) {
        if num % 2 == 0 {
            if maxEvenNum < num {
                maxEvenNum = num
            }
        }
    }
    return maxEvenNum
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}
```

func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Your code here
}

// Unit tests for the chooseNum function
assert(chooseNum(x: 12, y: 15) == 14, "Test case 1 failed")
assert(chooseNum(x: 13, y: 12) == -1, "Test case 2 failed")
assert(chooseNum(x: 10, y: 10) == 10, "Test case 3 failed")
assert(chooseNum(x: 7, y: 9) == 8, "Test case 4 failed")
assert(chooseNum(x: 1, y: 2) == 2, "Test case 5 failed")
assert(chooseNum(x: 0, y: 0) == 0, "Test case 6 failed")
assert(chooseNum(x: -1, y: 1) == -1, "Test case 7 failed")
assert(chooseNum(x: 1, y: 0) == 0, "Test case 8 failed")
assert(chooseNum(x: 1, y: 2) == 2, "Test case 9 failed")
assert(chooseNum(x: 1, y: 3) == 2, "Test case 10 failed")

print("All tests passed!")
```

func chooseNum(x: Int, y: Int) -> Int {
    // Check if x and y are positive integers
    guard x > 0, y > 0 else {
        return -1
    }
    
    // Check if x is greater than y
    guard x <= y else {
        return -1
    }
    
    // Find the largest even number within the range
    var largestEven = -1
    for num in x...y {
        if num % 2 == 0 {
            largestEven = num
        }
    }
    
    return largestEven
}

```swift
// This function takes two positive numbers x and y and returns the
// biggest even integer number that is in the range [x, y] inclusive. If 
// there's no such number, then the function should return -1.
// For example:
// chooseNum(x: 12, y: 15) == 14
// chooseNum(x: 13, y: 12) == -1
func chooseNum(x: Int, y: Int) -> Int {
    // Check if x and y are positive integers
    guard x > 0, y > 0 else {
        return -1
    }
    
    // Check if x is greater than y
    guard x <= y else {
        return -1
    }
    
    // Find the largest even number within the range
    var largestEven = -1
    for num in x...y {
        if num % 2 == 0 {
            largestEven = num
        }
    }
    
    return largestEven
}

// Example usage:
print(chooseNum(x: 12, y: 15)) // Output: 14
print(chooseNum(x: 13, y: 12)) // Output: -1
```