using System;

using System.Linq;                  

​

public class Program

{

    public static void Main()

    {

        var items = Console.ReadLine().Split('|').ToList();

        string command;

        while ((command = Console.ReadLine()) != "Yohoho!")

        {

            var data = command.Split();

            if(data[0] == "Loot")

            {

                for (int i = 1; i < data.Length; i++)

                {

                    if(!items.Contains(data[i]))

                    {

                        items.Insert(0, data[i]);

                    }

                }

            }

            else if (data[0] == "Drop")

            {

                int index = int.Parse(data[1]);

                if(index >= 0 && index < items.Count)

                {

                    items.Add(items[index]);

                    items.RemoveAt(index);

                }

            }

            else if (data[0] == "Steal")

            {

                int count = int.Parse(data[1]);

                count = Math.Min(count, items.Count);

                int startingIndex = items.Count - count;

                Console.WriteLine(string.Join(", ", items.GetRange(startingIndex, count)));

                items.RemoveRange(startingIndex, count);

            }

        }

        if(items.Count == 0)

        {

            Console.WriteLine("Failed treasure hunt.");

            return;

        }

        var averageGain = (double)items.Sum(i => i.Length) / items.Count;

        Console.WriteLine($"Average treasure gain: {averageGain:F2} pirate credits.");

    }

}