using System;
using System.Collections.Generic;
using System.Text;

namespace Simple_Text_Editor
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            StringBuilder text = new StringBuilder();
            Queue<int> queue = new Queue<int>();
            for (int i = 0; i < n; i++)
            {
                queue.Enqueue(i);
                string[] command = Console.ReadLine().Split(' ');
                int commandType = int.Parse(command[0]);
                switch(commandType)
                {
                    case 1:
                        text.Append(command[1]);
                        break;
                    case 2:
                        Stack<char> stack=new Stack<char>(text.ToString());
                        int number = int.Parse(command[1]);
                        for (int j = 0; j < number; j++)
                        {
                            stack.Pop();

                        }
                        text = new StringBuilder();
                        if (stack.Count > 0)
                        {
                            text.Append(stack.ToString());
                        }

                        break;
                    case 3:
                        int index = int.Parse(command[1]);
                        Console.WriteLine((text.ToString())[index-1]);
                        break;
                    case 4:

                        break;
                }
            }
            Console.WriteLine(text.ToString());
        }
    }
}