count the number of words in a sentence that occur in the special words list

def count_special_words(sentence, special_words):
  special_words = ["your", "words", "here"]
  special_words = [word.lower() for word in special_words]
  sentence_words = sentence.lower().split()
  count = 0
  for word in sentence_words:
    if word in special_words:
      count += 1
  return count
    
count_special_words("Hello, this is a sentence!", ["hello", "this"])