mod = 1000000007
eps = 10**-9


def main():
    import sys
    from math import gcd
    input = sys.stdin.readline

    A, B = map(int, input().split())
    g = gcd(A, B)
    ok = 1
    ng = g
    mid = (ok+ng) // 2
    while ng - ok > 1:
        if mid * mid <= g:
            ok = mid
        else:
            ng = mid
        mid = (ok+ng)//2
    if ok*ok == g:
        print("Odd")
    else:
        print("Even")


if __name__ == '__main__':
    main()