using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        /*string routerTemplate = "/ds";

        string path = "/s";

        string regexPattern = "^" + Regex.Replace(

            routerTemplate,

            @"\{[^\/}]+\}",

            @"\d+"

        ) + "/?$";

        bool match = Regex.IsMatch(path, regexPattern, RegexOptions.IgnoreCase);

        Console.WriteLine("Pattern:" + regexPattern);

        Console.WriteLine("Matches: " + match.ToString());*/

        string test = "es";

        string result = string.IsNullOrWhiteSpace(test) ? "/" : test;

        Console.WriteLine("Result: " + result);

    }

}