input: Write a function to sort the given list of words in alphabetical order and print the sorted list. If the list is empty, print an empty list.
  def sort_words(words):
      if not words:
          print([])
      else:
          words.sort()
          print(words)
  assert sort_words(['bubble', 'selection', 'quicksort', 'insertion'])==None
  assert sort_words([])==None
output: def sort_words(words):
      if not words:
          print([])
      else:
          words.sort()
          print(words)