Treasure Hunt

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

while True:
    command = input()
    if command == 'Yohoho!':
        break
    else:
        tokens = command.split(' ')
        cmd = tokens[0]
        if cmd == 'Loot':
            new_items = tokens[1:]
            [chest.insert(0, x) for x in new_items if x not in chest]
        elif cmd == 'Drop':
            idx = int(tokens[1])
            if 0 <= idx < len(chest):
                chest.append(chest.pop(idx))
        elif cmd == 'Steal':
            count = int(tokens[1])
            if len(chest) <= count:
                print(', '.join(chest))
                chest = []
            else:
                pos = len(chest) - count
                print(', '.join(chest[pos:]))
                chest = chest[:pos]

if chest:
    gain = sum([len(x) for x in chest]) / len(chest)
    print(f'Average treasure gain: {gain:.2f} pirate credits.')
else:
    print('Failed treasure hunt.')