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);