Treasure Hunt

chest = input().split('|')
counter = 0


while True:
    text = input().split()
    command = text[0]
    if command == 'Yohoho!':
        break
    elif command == 'Loot':
        for item in text[1::]:
            if item not in chest:
                chest.insert(0, item)
    elif command == 'Drop':
        index = int(text[1])
        if 0 <= index < len(chest):
            chest.append(chest.pop(index))
    elif command == 'Steal':
        stolen = []
        count = int(text[1])
        if count <= len(chest):
            stolen = chest[-count ::]
            for i in range(count):
                chest.pop()
        else:
            stolen = chest.copy()
            chest.clear()
        print(', '.join(stolen))
    else:
        break
if chest:
    credit = 0
    for item in chest:
        counter += len(item)
    credit = counter / len(chest)
    print(f'Average treasure gain: {credit:.2f} pirate credits.')
else:
    print('Failed treasure hunt.')