using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        //It Performs Append,insert,remove and replace operation

        Console.WriteLine("---------------String Builder--------------------");

        StringBuilder s=new StringBuilder();

                s.Append("sankar ");

                s.Append("ganesh ");

        Console.WriteLine(s);

                s.Insert(7,"selvam ");

        Console.WriteLine(s);

                s.Remove(14,3);

        Console.WriteLine(s);

                s.Replace("esh","mangalam");

        Console.WriteLine(s);   

        Console.WriteLine("---------------String ------------------------");

        string t=string.Empty;

        int a=Convert.ToInt32(Console.ReadLine());

        for(int i=0;i<a;i++)

        {

            t+=" "+Console.ReadLine();

        }

        Console.WriteLine(t);

        Console.WriteLine("-------------------------------------------------");

    }

}