import sys
input=lambda: sys.stdin.readline().rstrip()
a,b=map(int,input().split())
def gcd(a,b):
  while b:
    a,b=b,a%b
  return a
d=gcd(a,b)
d2=int(d**0.5)
if d2**2==d:
    print("Odd")
else:
    print("Even")