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

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