last stop

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Threading;

namespace ConsoleApp1
{
    class Exam
    {
        static void Main(string[] args)
        {
            List<string> numbers = Console.ReadLine().Split().ToList();

            string[] command = Console.ReadLine().Split().ToArray();

            while (command[0] != "END")
            {
                if (command[0] == "Change")
                {
                    if (numbers.Contains(command[1]))
                    {
                        int index = numbers.IndexOf(command[1]);
                        numbers[index] = command[2];
                    }
                }
                if (command[0] == "Hide")
                {
                    if (numbers.Contains(command[1]))
                    {
                        numbers.Remove(command[1]);
                    }
                }
                if (command[0] == "Switch")
                {
                    if (numbers.Contains(command[1]) && numbers.Contains(command[2]))
                    {
                        int index1 = numbers.IndexOf(command[1]);
                        int index2 = numbers.IndexOf(command[2]);

                        numbers[index1] = command[2];
                        numbers[index2] = command[1];
                    }
                }
                if (command[0] == "Insert")
                {
                    int index = int.Parse(command[1]) + 1;

                    if (index >= 0 && index < numbers.Count)
                    {
                        numbers.Insert(index, command[2]);
                    }
                }
                if (command[0] == "Reverse")
                {
                    numbers.Reverse();
                }

                command = Console.ReadLine().Split().ToArray();
            }

            Console.WriteLine(string.Join(" ",numbers));
        }
    }
}