import math
import sys


a1, b1, a2, b2, a3, b3 = (int(x) for x in input().split())

#s = int(pow(a1, b1) + pow(a2, b2)+pow(a3, b3))
#int s = a1**b1+a2**b2+a3**b3
s = a1 + a2 + a3
if s%2==0:
    print(":-)")
else:
    print(":-(")