using System;
using System.Collections.Generic;
using System.Linq;

namespace _3._HouseParty
{
    class HouseParty
    {

        static void Main()
        {
            int n = int.Parse(Console.ReadLine());

            List<string> guests = new List<string>();

            for (int i = 0; i < n; i++)
            {
                string input = Console.ReadLine();

                string[] splitedInput = input.Split(" ");
                string name = splitedInput[0];

                //if (splitedInput.Length == 3)
                if (splitedInput[1] == "is" && splitedInput[2] == "going!")
                {
                    if (!guests.Contains(name))
                    {
                        guests.Add(name);
                    }

                    else
                    {
                        Console.WriteLine($"{name} is already in the list!");
                    }

                }

                //if (splitedInput.Length == 4)
                if (splitedInput[2] == "not")
                {
                    if (guests.Contains(name))
                    {
                        guests.Remove(name);
                    }

                    else
                    {
                        Console.WriteLine($"{name} is not in the list!");
                    }
                }


            }
                Console.WriteLine(string.Join(Environment.NewLine, guests));
        }
    }
}