from math import *

def is_sqrt(n):
    yes = 1
    no = 10 ** 18
    while no - yes != 1:
        mid = (yes + no)//2
        if n >= mid * mid:
            yes = mid
        else:
            no = mid
    return n == yes * yes

A, B = map(int, input().split())
G = gcd(A, B)
print("Odd") if is_sqrt(G) else print("Even")