//19.02.2017 Problem:You will be given an integer N.On the next N lines, you will receive some strings.
//The strings will be either:
//•	sequences of random characters
//•	or the command - "spin"

//If they are normal random characters, you should append them to one another in the cypher string.
//If the command "spin" is entered, every string entered after it should be appended at the start
//of the cypher string, if the command "spin" is entered again after that, you should again begin to append
//them at the end of the cypher string. And so, the append direction changes each time you enter the command "spin".
//If two equal strings are entered two consecutive times, the cypher resets - emptying the cypher string. This rule also applies to the "spin" command.
//Note: the "spin" commands do not count towards the N count.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Cypher_Roulette
{
    class cypher_toulette
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            string cypherString = "";
            string buffer = "";
            string inputText = "";
            bool addBack = true;
            for (int i = 0; i <n; i++)
            {
                buffer = inputText;
                inputText = Console.ReadLine();

                if (buffer == inputText)
                {
                    cypherString = "";
                    inputText = "";

                }

                if (inputText=="spin")
                {
                    inputText = "";
                    i--;
                    addBack = !addBack;
                }
                if (addBack==true)
                {
                    cypherString = cypherString + inputText;
                }
                else if (addBack==false)
                {
                    cypherString = inputText + cypherString;
                }
            }
            Console.WriteLine(cypherString);
        }
    }
}