import sys
import math
import collections

sys.setrecursionlimit(10 ** 8)

input = sys.stdin.readline


def main():
    A, B = [int(x) for x in input().split()]

    x = math.gcd(A, B)

    if x == math.sqrt(x) * math.sqrt(x):
        print("Odd")
    else:
        print("Even")


if __name__ == '__main__':
    main()