import math

a, b = map(int, input().split())
g = math.gcd(a, b)

cnt = {}
cur = g
for x in range(2, int(math.sqrt(g)) + 1):
  while cur % x == 0:
    cnt[x] = cnt.get(x, 0) + 1
    cur //= x

if cur > 1:
  cnt[cur] = cnt.get(cur, 0) + 1

ans = 1
for _, v in cnt.items():
  ans *= (v + 1)

if ans % 2 == 0:
  print("Even")
else:
  print("Odd")