input: def extract_non_vowel_words(sentence: str) -> List[str]:
      """
      Extracts the non-vowel words from a given sentence.
  
      >>> extract_non_vowel_words("This machine learning project is challenging.")
      ['machine', 'learning', 'project', 'is', 'chllngng']
      """
      non_vowel_words = []
      words = sentence.split()
      vowels = ['a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U']
      for word in words:
          if not any(char in vowels for char in word):
              non_vowel_words.append(word)
      return non_vowel_words
output:     for i in range(len(words)):
          if words[i] not in non_vowel_words:
              new_word = ''.join([char for char in words[i] if char not in vowels])
              non_vowel_words.append(new_word)
      return non_vowel_words