using System;

public class Program

{

    public static void Main()

    {

        var v49 = new Version("4.9");

        var v410 = new Version("4.10");

        var v411 = new Version("4.11");

        Console.WriteLine(v411 > v49 ? "4.11 > 4.9" : ":(");

        Console.WriteLine(v49 < v410 ? "4.9 < 4.10" : ":(");

    }

}