using System;

public class Program

{

    public static void Main()

    {

        string a="Hristian",b;

        b="Ivanov";

        string s=Console.ReadLine();

        Console.WriteLine(a);

        Console.WriteLine(a.Length);

        Console.WriteLine(b);

        Console.WriteLine(s.Length);

        Console.WriteLine(b[4]);

        Console.WriteLine(b + " " + a);

        char a1;

        a1='%';

        Console.WriteLine(a1);

        Console.WriteLine(a.ToUpper());

        Console.WriteLine(a.ToLower());

    }

}