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

def gcd(a, b):
    if a < b:
        a, b = b, a
    if a%b == 0:
        return b
    return gcd(b, a%b)

M = gcd(A, B)
if M**0.5 == int(M**0.5):
    ans = "Odd"
else:
    ans = "Even"

print(ans)