using System;

public class Program

{

    public static   void Main()

{

    var input = "0240774a7100z7e6az111ez4553z11eb2bdf";

    var reverse = ReverseString(input);

    reverse.Replace('z','-').Dump();

}

public static string ReverseString(string s)

    {

    char[] arr = s.ToCharArray();

    Array.Reverse(arr);

    return new string(arr);

    }

}