from math import *

def factorization(n):
    arr = []
    temp = n
    for i in range(2, int(-(-n**0.5//1))+1):
        if temp%i==0:
            cnt=0
            while temp%i==0:
                cnt+=1
                temp //= i
            arr.append([i, cnt])

    if temp!=1:
        arr.append([temp, 1])

    return arr

A, B = map(int, input().split())
ans = 1
for _, a in factorization(gcd(A, B)):
    ans *= (a + 1)
print("Odd") if ans % 2 else print("Even")