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" : ":(");
}