using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _2
{
	class Program
	{
		static void Main(string[] args)
		{
			string input;
			List<string> names = Console.ReadLine().Split(',').ToList();
			do
			{
				input = Console.ReadLine();
				switch (input)
				{
					case "Add visitor":
						string visitor = Console.ReadLine();
						names.Add(visitor);
						break;
					case "Add visitor on position":
						string visitor1 = Console.ReadLine();
						byte pos = byte.Parse(Console.ReadLine());
						names.Insert(pos, visitor1);
						break;
					case "Remove visitor on position":
						byte pos1 = byte.Parse(Console.ReadLine());
						names.RemoveAt(pos1);
						break;
					case "Remove last visitor":
						names.RemoveAt(names.Count-1);
						break;
					case "Remove first visitor":
						names.RemoveAt(0);
						break;

				}
			} while (input != "END");



			Console.WriteLine(string.Join(", ", names));


		}

	}
}