inventory

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

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

            List<string> command = Console.ReadLine().Split(" - ").ToList();

            while (command[0] != "Craft!")
            {
                string commandName = command[0];
                string value = command[1];
                if (commandName == "Collect")
                {
                    if (!(list.Contains(value)))
                    {
                        list.Add(value);
                    }
                }
                else if (commandName == "Drop")
                {
                    if (list.Contains(value))
                    {
                        list.Remove(value);
                    }
                }
                else if (commandName == "Renew")
                {
                    if (list.Contains(value))
                    {
                        string temp = command[1];
                        list.Remove(value);
                        list.Add(temp);
                    }
                }
                else if (commandName == "Combine Items")
                {
                    List<string> combine = value.Split(':').ToList();
                    string oldItem = combine[0];
                    string newItem = combine[1];
                    if (list.Contains(oldItem))
                    {
                        int index = list.IndexOf(oldItem);
                        int newIndex = index + 1;
                        list.Insert(newIndex, newItem);
                    }
                }

                command = Console.ReadLine().Split(" - ").ToList();
            }

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