input: Write a function to extract the non-vowel words from a given sentence. If the sentence is empty, return an empty list.
  assert extract_words("This machine learning project is challenging.")==['This', 'machine', 'learning', 'project', 'is', 'challenging.']
  assert extract_words("Apple is a fruit.")==['is', '.']
  assert extract_words("xyz tfgh")==['xyz', 'tfgh']
  assert extract_words("")==[]
output: def extract_words(sentence):
      vowels = "aeiouAEIOU"
      if not sentence:
          return []
      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