using System;

public class Program

{

    public static void Main(string[] args)

    {

        Console.WriteLine("C# is used to develop web apps, desktop apps, mobile apps, games and much more.");

        string bio = "C# is used to develop web apps, desktop apps, mobile apps, games and much more.";

        Console.WriteLine("");

        Console.WriteLine("Да се изведе само:");

        string authorName = bio.Substring(21,57);

        Console.WriteLine(authorName);

    }

}