struct Scanner {
    private var stack = [String]()
    private var index = 0
    
    mutating func peek() -> String {
        if stack.count == index {
            stack += readLine()!.split(separator: " ").map{ String($0) }
        }
        return stack[index]
    }
    
    mutating func next() -> String {
        let value = peek()
        index += 1
        return value
    }
    
    mutating func nextInt() -> Int {
        return Int(next())!
    }
    
    mutating func nextDouble() -> Double {
        return Double(next())!
    }
}

var scanner = Scanner()
let A = scanner.nextInt()
let B = scanner.nextInt()

func gcd(_ x: Int, _ y: Int) -> Int {
    if y == 0 {
        return x
    } else {
        return gcd(y, x % y)
    }
}

func isSquare(_ n: Int) -> Bool {
    var l: Int = 0
    var r: Int = 100100100
    while r - l > 1 {
        let m = (l + r) / 2
        if m * m >= n {
            r = m
        } else {
            l = m
        }
    }
    return r * r == n
}

if isSquare(gcd(A, B)) {
    print("Odd")
} else {
    print("Even")
}