using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var e = new bool[3];
        e[0] = int.Parse(line[0]) % 2 == 0;
        e[1] = int.Parse(line[2]) % 2 == 0;
        e[2] = int.Parse(line[4]) % 2 == 0;
        var count = 0;
        for (int i = 0; i < 3; i++)
            if (e[i]) count++;
        if (count == 1 | count == 3) Console.WriteLine(":-)");
        else Console.WriteLine(":-(");
    }
}