inventory

def collect_func(data, item):
    if item not in data:
        data.append(item)

    return data

def drop_func(data, item):
    if item in data:
        data.remove(item)

    return data

def combine_items_func(data, items):
    items = items.split(':')
    old_element = items[0]
    new_element = items[1]

    if old_element in data:
        index_old_element = data.index(old_element)
        data.insert(index_old_element + 1, new_element)

    return data

def renew_func(data, item):
    if item in data:
        data.remove(item)
        data.append(item)

    return data

def inventory(data):

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

        if command[0] == 'Craft!':
            print(', '.join(data))
            break

        current_command = command[0]
        item = command[1]

        if current_command == 'Collect':
            data = collect_func(data, item)
        elif current_command == 'Drop':
            data = drop_func(data, item)
        elif current_command == 'Combine Items':
            data = combine_items_func(data, item)
        elif current_command == 'Renew':
            data = renew_func(data, item)

info = input().split(', ')
inventory(info)