using System;
using System.Linq;
using System.Collections.Generic;

class MyClass
{
    public static void Solve()
    {
        var input = Console.ReadLine().Split().Select(int.Parse).ToArray();
        var A = input[0];
        var B = input[1];
        var C = input[2];
        var D = input[3];
        var E = input[4];
        var F = input[5];
        Console.WriteLine((A + C + E) % 2 == 0 ? ":-)" : ":-(");
    }

    public static void Main()
    {
        Solve();
    }
}