#!/usr/bin/env python3

import math


def is_square(n):
    sr = math.sqrt(n)
    return sr - math.floor(sr) == 0


def is_even(a, b):
    g = math.gcd(a, b)
    return not is_square(g)


def main():
    a, b = (int(z) for z in input().split())
    if is_even(a, b):
        print("Even")
    else:
        print("Odd")


if __name__ == '__main__':
    main()