from math import gcd
a, b = map(int, input().split())
g = gcd(a, b)
l, r = 1, g + 1
while r - l > 1:
    m = (l + r) // 2
    if m * m <= g:
        l = m
    else:
        r = m
if l * l == g:
    print('Odd')
else:
    print('Even')