using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {   

        string input = "have a nice day";

        //Expected Output: "aaac d eehi nvy";

        string output = SortString(input);

        for(int i = 0; i<= input.Length; i++){

            Console.WriteLine(i);

        }

        Console.WriteLine(output);

    }

    public static string SortString(string x)

    {

        string output = "";

        return output.CompareTo(x) ;

    }

}