def is_odd(num):
    if num % 2 == 0:
        return 0
    else:
        return 1


num1, pow1, num2, pow2, num3, pow3 = map(int, input().split(' '))

ans = sum([is_odd(x) for x in (num1, num2, num3)]) % 2 == 0

if ans:
    print(":-)")
else:
    print(":-(")
exit(0)