input: def extract_words(sentence: str) -> List[str]:
      """ Extracts and returns a list of words from the given sentence that do not contain any vowels.
      >>> extract_words("This machine learning project is challenging.")
      ['This', 'machine', 'learning', 'project', 'is', 'challenging.']
      >>> extract_words("Hello World!")
      ['World!']
      """
output:     vowels = "aeiouAEIOU"
      words = sentence.split()
      result = [word for word in words if all(char not in vowels for char in word)]
      return result