def gcd(a,b):
    if b==0:
        return a
    return gcd(b,a%b)
a,b = map(int, input().split())
c = gcd(a,b)
high = c+1
low = 0
ans = c+1
while low+1<high:
    mid = (low+high)//2
    if mid**2>c:
        high = mid
    elif mid**2<c:
        low = mid
    else:
        ans = mid
        break
if ans>c:
    print("Even")
else:
    print("Odd")