a,b = map(int, input().split())
import math
g = math.gcd(a, b)

def try_square_root_naive(n):
    m = int(n**.5)
    return True if abs(m*m - n) < 1e-6 else False

if try_square_root_naive(g):
    print('Odd')
else:
    print('Even')