old_contents: shopping_list = []
  
  def show_help():
    print("What should we pick up at the store?")
    print("Enter DONE to stop. Enter HELP for this help. Enter SHOW to see your current list.")
  
  
new_contents: shopping_list = []
  
  def show_help():
    print("What should we pick up at the store?")
    print("Enter DONE to stop. Enter HELP for this help. Enter SHOW to see your current list.")
  
  def add_to_list(item):
    shopping_list.append(item)
    print("Added! List has {} items.".format(len(shopping_list)))
  
  
  
subject: Add an item to the shopping list.