def is_square2(N):
    """
    N = a**2 + r
    If r==0, N is squared number.
    """
    a,r = 0,0
    for s in reversed(range(0,N.bit_length(),2)):
        t = N>>s&3
        r = r<<2|t
        c = a<<2|1
        b = r>=c
        if b: r -= c
        a = a<<1|b
    return (a,r)


from math import gcd

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

a,r=is_square2(g)

print("Odd" if r==0 else "Even")