using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        char[] separators = new char[] {','};

        string str = "2,,";

        string[] outp = str.Split(separators);

        Console.WriteLine(outp.Length);

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

        {

            Console.WriteLine($"{i} {outp[i].Length} {outp[i]}");

        }

    }

}