using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        string demostr = "ab*cd*ed*gh*ij*";

        string[] valuereplace = {"00","01","10","11"};

        for(int i=valuereplace.Length - 1 ; i >=0 ; i--)

        {

        Console.WriteLine(demostr.Replace("*",valuereplace[i]));    

        }

        Console.WriteLine();

        Console.WriteLine();

​

        for(int j= 0 ; j <=valuereplace.Length-1 ; j++)

        {

            StringBuilder sb = new StringBuilder("ab*cd*ed*gh*ij*");

            Console.WriteLine(sb.Replace("*",valuereplace[j]));

        }

    }

}