treasure_hunt

loot = input().split("|")

while True:
    command = input().split()

    if "Yohoho!" in command:
        break
    elif "Loot" in command:
        items = command[1:]
        for item in items:
            if item not in loot:
                loot.insert(0, item)
    elif "Drop" in command and 0 <= int(command[1]) < len(loot):
        removed = loot.pop(int(command[1]))
        loot.append(removed)
    elif "Steal" in command and int(command[1]) > 0:
        count = int(command[1])
        stolen = loot[-count:]
        loot = loot[:-count]
        print(", ".join(stolen))
if len(loot) == 0:
    print("Failed treasure hunt.")
else:
    lens = [int(len(s)) for s in loot]
    average = sum(lens)/len(loot)
    print(f"Average treasure gain: {average:.2f} pirate credits.")