Inventory

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

while True:
    tokens = input().split(' - ')
    if tokens[0] == 'Craft!':
        print(', '.join(initial_items))
        break
    else:
        command = tokens[0]
        value = tokens[1]
        if command == 'Collect':
            if value not in initial_items:
                initial_items.append(value)
        elif command == 'Drop':
            if value in initial_items:
                initial_items.remove(value)
        elif command == 'Combine Items':
            items = value.split(':')
            old_item = items[0]
            new_item = items[1]
            if old_item in initial_items:
                initial_items.insert(initial_items.index(old_item) + 1, new_item)
        elif command == 'Renew':
            if value in initial_items:
                initial_items.append(initial_items.pop(initial_items.index(value)))