Treasure Hunt

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

command = input()
while command != 'Yohoho!':
    tokens = command.split(' ')
    if tokens[0] == 'Loot':
        items = tokens[1:]
        [loot.insert(0, x) for x in items if x not in loot]
    elif tokens[0] == 'Drop':
        idx = int(tokens[1])
        if idx >= 0 and idx < len(loot):
            item = loot.pop(idx)
            loot.append(item)
    elif tokens[0] == 'Steal':
        count = int(tokens[1])
        if count > len(loot):
            count = len(loot)
        stolen = loot[-count:]
        loot = loot[:-count]
        print(', '.join(stolen))
    command = input()

if len(loot) == 0:
    print('Failed treasure hunt.')
else:
    average_gain = sum([len(x) for x in loot]) / len(loot)
    print(f'Average treasure gain: {average_gain:.2f} pirate credits.')