A,B = map(int,input().split())

def gcd(a,b):
    while True:
        r = a % b
        a = b
        b = r
        if r == 0:
            return a
X = gcd(A,B)
import math
if int(math.sqrt(X)) ** 2 == X:
    print('Odd')
else:
    print('Even')