text: shopping_list = []
  
  def show_help():
      print("What should we pick up at the store?")
      print("""
  Enter 'DONE' to stop adding items.
  Enter 'HELP' for this help.
  Enter 'SHOW' to show the current list.
  """)
      
  
  def add_to_list(item):
      shopping_list.append(item)
      print("Added! Your shopping list has {} items in it".format(len(shopping_list)))
  
  
  def show_list():
      print("Here's your list:")
      for item in shopping_list:
          print(item)
          
      
  show_help()
  
  while True: 
      new_item = input("> ")
      
      if new_item == "DONE":
          break
      elif new_item == "HELP":
          show_help()
          continue
      elif new_item == 'SHOW':
          show_list()
          continue
      add_to_list(new_item)
  
  show_list()
  