class Problem0892:
    def solve(this):
        a1,b1,a2,b2,a3,b3 = map(int,input().split())
        res = a1 + a2 + a3
        if res % 2 == 0:
            print(":-)")
        else:
            print(":-(")

if __name__ == "__main__":
    problem = Problem0892()
    problem.solve()