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

gcd = math.gcd(A,B)

if gcd == 1:
    print("Odd")
    exit()

cnt = 1
for i in range(1,int(gcd**0.5)+2):
    if gcd % i == 0:
        cnt += 1

if cnt % 2:
    print("Odd")
else:
    print("Even")