def isqrt(n):
    assert n >= 0
    if n < 2: return n
    x = int(n**0.5)*2
    while x*x > n:
        x = (x+n//x)//2
    return x

from math import gcd
g = gcd(*map(int,input().split()))
print("Odd" if isqrt(g)**2==g else "Even")