input: Write a function to extract the non-vowel words from a given sentence.
  
  assert extract_words("This machine learning project is challenging.")==['machine', 'learning', 'project', 'is', 'challenging']
output: def extract_words(sentence):
      vowels = "aeiouAEIOU"
      return [word for word in sentence.split() if not any(char in vowels for char in word)]