input: def extract_words(sentence: str) -> List[str]:
      """ Extract the non-vowel words in a given sentence.
      >>> extract_words("This machine learning project is challenging.")
      ['This', 'machine', 'is', 'challenging.']
      """
output:     vowels = "aeiouAEIOU"
      words = sentence.split()
      result = [word for word in words if not any(char in vowels for char in word)]
      return result