input: Write a python function to sort a list of words by their length.
  assert sort_words_by_length(["Hello","World!","Good","Morning"])==["Good","Hello","World!","Morning"]
  assert sort_words_by_length(["Python","is","awesome"])==["is","Python","awesome"]
  assert sort_words_by_length(["a","ab","abc","abcd"])==["a","ab","abc","abcd"]
output: def sort_words_by_length(words):
      return sorted(words, key=len)