Easter Gifts

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

namespace Easter_Gifts
{
    class Program
    {
        static void Main()
        {
            string[] gifts = Console.ReadLine()
                .Split()
                .ToArray();

            while (true)
            {
                string command = Console.ReadLine();
                if (command == "No Money")
                {
                    break;
                }

                else
                {
                    string[] checkGifts = command
                        .Split()
                        .ToArray();

                    string gift = checkGifts[1];

                    if (checkGifts[0] == "OutOfStock")
                    {
                        gifts = gifts.Select(x => x == gift ? "None" : x).ToArray();
                    }

                    else if (checkGifts[0] == "Required")
                    {
                        int index = int.Parse(checkGifts[2]);

                        if (index >= 0 && index < gifts.Length)
                        {
                            gifts[index] = gift;
                        }

                    }

                    else if (checkGifts[0] == "JustInCase")
                    {
                        gifts[gifts.Length - 1] = gift;
                    }
                }
            }

            foreach (var s in gifts.Where(s => s != "None"))
            {
                Console.Write($"{s} ");
            }



        }
    }
}