input: Write a function to determine if a given sentence is an 'affirmative' sentence or a 'negative' sentence. Use negation words to identify if a sentence is negative. If the sentence contains negation words, return 'Negative', otherwise return 'Affirmative'.
  assert isAffirmativeorNegative("He always comes late but I dont mind.") == "Negative"
  assert isAffirmativeorNegative("She is always on time.") == "Affirmative"
  assert isAffirmativeorNegative("There is no reason for this.") == "Negative"
  assert isAffirmativeorNegative("Everybody loves pizza.") == "Affirmative"
  assert isAffirmativeorNegative("No one was absent from the meeting.") == "Negative"
output: def isAffirmativeorNegative(sentence):
      negation_words = ["no", "not", "never", "none", "nobody", "nothing", "neither", "nor", "nowhere", "hardly", "scarcely", "barely", "don't", "doesn't", "didn't", "isn't", "aren't", "wasn't", "weren't", "can't", "couldn't", "shouldn't", "wouldn't", "won't", "mustn't"]
      for word in negation_words:
          if word in sentence.lower():
              return "Negative"
      return "Affirmative"