input: Write a function to determine if a given sentence is an 'affirmative' sentence or a 'negative' sentence. If the sentence contains any negation words, it should be classified as 'Negative'. If no such words are present, it should be classified as 'Affirmative'.
  assert isAffirmativeorNegative("He always comes late but I dont mind.") == "Negative"
  assert isAffirmativeorNegative("The sky is blue.") == "Affirmative"
  assert isAffirmativeorNegative("I never go to the park.") == "Negative"
  assert isAffirmativeorNegative("She likes to read books.") == "Affirmative"
  assert isAffirmativeorNegative("There is no problem.") == "Negative"
output: def isAffirmativeorNegative(sentence):
      negation_words = ["no", "not", "never", "dont", "doesnt", "isnt", "arent", "wont", "cant"]
      for word in sentence.split():
          if word.lower() in negation_words:
              return "Negative"
      return "Affirmative"