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

def gcd(a, b):
    if a < b:
        a, b = b, a
    if a%b == 0:
        return b
    return gcd(b, a%b)

M = gcd(A, B)
dic = {}
i = 2
while i <= M**0.5:
    if M%i == 0:
        cnt = 0
        while M%i == 0:
            M //= i
            cnt += 1
        dic[i] = cnt
    i += 1
if M > 1:
    dic[M] = 1

ans = "Odd"
for key in dic:
    if dic[key]%2 == 1:
        ans = "Even"
        break
print(ans)