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

namespace apps
{
    class Program
    {

        static void Main()
        {
            List<string> Inventory = Get().Split(", ").ToList();
            while (true)
            {
                string input = Get(); if (input == "Craft!") { break; }
                string[] inputs = input.Split(" - ").ToArray();
                string command = inputs[0];
                string target = inputs[1];
                if (command == "Collect") { if (Inventory.Contains(target) == false) { Inventory.Add(target); } }
                if (command == "Drop") { Inventory.Remove(target); }
                if (command == "Renew") { Inventory.Remove(target); Inventory.Add(target); }
                if (command == "Combine Items")
                {
                    string[] item = target.Split(':'); // check if old exists -> if then add the new after the old
                    if (Inventory.Contains(item[0]))
                    {
                        Inventory.Remove(item[1]);
                        int pos = FindListItemIndex(Inventory, item[0]);
                        Inventory.Insert(pos + 1, item[1]);

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

        static string Get() { return Console.ReadLine(); }
        static int FindListItemIndex(List<string> collection, string target)
        {
            int position = 0;

            for (int i = 0; i < collection.Count; i++)
            {
                if (collection[i] == target) { position = i; break; }
            }
            return position;
        }



    }
}