from math import gcd
from typing import List, Tuple
 
 
def pf(n: int) -> List[Tuple[int,int]]:
    r = []
    for p in range(2, n):
        if p * p > n:
            break
        e = 0
        if n % p == 0:
            while(n % p == 0):
                n //= p
                e += 1
            r.append((p, e))
    if n != 1:
        r.append((n, 1))
    return r


a,b = map(int,input().split())
g = gcd(a,b)
c = pf(g)
ans = 1
for p,e in c:
    ans *= e+1
    ans %= 2
print("Odd" if ans%2 else "Even")