using System;

public class Program

{

    public static void Main()

    {

         string s1 = "burgas", s2=" e nai-dobriqt", s3=" grad za jiveene";

         Console.WriteLine(s1.Length);

         string s4 = s1.ToUpper();

         Console.WriteLine(s4);

         string jechev = string.Concat(s1, s2, s3);

         Console.WriteLine(jechev);

        Console.WriteLine(jechev.IndexOf("u"));

    }

}