import sys
input=sys.stdin.readline
def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))

def main():
    from math import gcd
    mod=10**9+7
    A,B=MI()
    g=gcd(A,B)
    a=int(g**0.5)
    if a*a==g:
        print("Odd")
    else:
        print("Even")

    
    


main()