from sys import stdin

def main():
    input = lambda: stdin.readline()[:-1]
    A1, B1, A2, B2, A3, B3 = map(int, input().split())

    odd = 0
    for i in (A1, A2, A3):
        odd += i % 2
    if not odd or odd == 2:
        print(':-)')
    else:
        print(':-(')

main()