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

def gcd(a,b):
    while b != 0:
        r = a % b
        a = b
        b = r
    return a   

temp = gcd(A,B)

if int(temp**0.5+0.000000000001)**2 == temp :
    print("Odd")
else:
    print("Even")