import sys
import math


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    a, b = map(int, input().split())
    x = math.gcd(a, b)
    return 'Odd' if math.isqrt(x) ** 2 == x else 'Even'


if __name__ == '__main__':
    ret = main()
    if ret is not None:
        print(ret)