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


namespace Inventory
{
    class Inventory
    {
        static void Main()
        {
            List<string> words = Console.ReadLine()
                .Split(", ")
                .ToList();
            string input = Console.ReadLine();

            while (input != "Craft!")
            {
                string[] splitedInput = input.Split(" - ");
                string command = splitedInput[0];

                if (command == "Collect")
                {
                    string item = splitedInput[1];
                    if (!words.Contains(item))
                    {
                        words.Add(item);
                    }


                }
                else if (command == "Drop")
                {
                    string item = splitedInput[1];
                    if (words.Contains(item))
                    {
                        words.Remove(item);
                    }
                }
                else if (command == "Combine Items")
                {
                    string[] splitedInput1 = splitedInput[1].Split(':');
                    string oldItem = splitedInput1[0];
                    string newItem = splitedInput1[1];

                    if (words.Contains(oldItem))
                    {
                        int index = words.IndexOf(oldItem);
                        words.Insert(index + 1, newItem);

                    }

                }
                else if (command == "Renew")
                {
                    string item = splitedInput[1];
                    if (words.Contains(item))
                    {
                        words.Remove(item);
                        words.Add(item);
                    }

                }
                input = Console.ReadLine();
            }

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