input: Write a python function to filter words with length less than or equal to 5.
  assert filter_words(["hello", "world", "computer"]) == ['hello', 'world']
  assert filter_words(["apple", "banana", "pear", "kiwi"]) == ['apple', 'pear', 'kiwi']
  assert filter_words(["this", "is", "a", "test"]) == ['this', 'is', 'a', 'test']
output: def filter_words(words):
      return [word for word in words if len(word) <= 5]