using System;

​

namespace TechBeamers

{

    delegate string del(string str);

    class sample

    {

        public static string DelegateSample(string a)

        {

            return a.Replace(',', '*');

        }

    }

    public class InterviewProgram

    {

        public static void Main(string[] args)

        {

            del str1 = new del(sample.DelegateSample);

            string str = str1("Welcome,,friends,,to,,TechBeamers");

            Console.WriteLine(str);

        }

    }

}