"""

https://yukicoder.me/problems/no/1113

"""

import math

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

G = math.gcd(A,B)

L,R = 0,10**10

while R-L != 1:
    M = (L+R)//2
    if M**2 > G:
        R = M
    else:
        L = M

if L**2 == G:
    print ("Odd")
else:
    print ("Even")