from math import gcd
A,B=map(int,input().split())
g=gcd(A,B)
start=0
end=10**9+1
while end-start>1:
    test=(end+start)//2
    if g>=test**2:
        start=test
    else:
        end=test

if start**2==g:
    print("Odd")
else:
    print("Even")