Invemtory_MidExam

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

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

            string command = Console.ReadLine();

            while (command != "Craft!")
            {
                string[] newCommand = command.Split(" - ");
                //string instruction = newCommand[0];

                if (newCommand[0] == "Collect")
                {
                    string item = newCommand[1];

                    if (journal.Contains(item))
                    {
                        continue;
                    }
                    else
                    {
                        journal.Add(item);
                    }
                }
                else if (newCommand[0] == "Drop")
                {
                    string item = newCommand[1];

                    if (journal.Contains(item))
                    {
                        journal.Remove(item);
                    }
                }
                else if (newCommand[0] == "Combine Items")
                {
                    string items = newCommand[1];
                    string[] newItems = items.Split(":");
                    string itemOne = newItems[0];
                    string itemTwo = newItems[1];

                    if (journal.Contains(itemOne))
                    {
                        int indexOldItem = journal.IndexOf(itemOne) + 1;
                        journal.Insert(indexOldItem, itemTwo);
                    }
                }
                else if (newCommand[0] == "Renew")
                {
                    string item = newCommand[1];

                    if (journal.Contains(item))
                    {
                        journal.Remove(item);
                        journal.Add(item);
                    }
                }

                command = Console.ReadLine();
            }

            if (command == "Craft!")
            {
                Console.WriteLine(string.Join(", ", journal));
            }
        }
    }
}