phone_shop

phones = input().split(', ')

command = input().split(' - ')

while not command[0] == 'End':
    action = command[0]
    if action == 'Add':
        phone = command[1]
        if phone not in phones:
            phones.append(phone)
    elif action == 'Remove':
        phone = command[1]
        if phone in phones:
            phones.remove(phone)
    elif action == 'Bonus phone':
        old_phone = command[1].split(':')[0]
        new_phone = command[1].split(':')[1]
        if old_phone in phones:
            phones.insert(phones.index(old_phone) + 1, new_phone)
    elif action == 'Last':
        phone = command[1]
        if phone in phones:
            phones.append(phones.pop(phones.index(phone)))
    command = input().split(' - ')

print(*phones, sep=', ')