input: Write a function to extract the non-vowel words in a sentence. Return a list of the non-vowel words.
  assert extract_words("This machine learning project is challenging.")==['Ths', 'mch', 'lrnng', 'prjct', 's', 'chlngng']
  assert extract_words("Hello World!")==['Hll', 'Wrld']
  assert extract_words("AI is transforming the world")==['AI', 's', 'trnsfrmmng', 'th', 'wrld']
  assert extract_words("")==[]
  assert extract_words("xyz t f g")==["xyz", "t", "f", "g"]
  assert extract_words("aeiou AEIOU")==[]
output: def extract_words(sentence):
      vowels = "aeiouAEIOU"
      words = sentence.split()
      non_vowel_words = [word for word in words if not any(char in vowels for char in word)]
      return non_vowel_words