input: Write a function to sort the given list of strings in alphabetical order. If the list is empty, print an empty list.
  def sort_words(words):
      words.sort()
      print(words)
  assert sort_words(['bubble', 'selection', 'quicksort', 'insertion'])==None
  assert sort_words(['z', 'a', 'b', 'c'])==None
  assert sort_words([])==None
output: def sort_words(words):
      words.sort()
      print(words)