input: from typing import List
  
  def isAffirmativeorNegative(sentence: str) -> str:
      """
      Identifies whether a given sentence is an 'affirmative' sentence or a 'negative' sentence.
      
      >>> isAffirmativeorNegative("He always comes late but I dont mind.")
      'Negative'
      >>> isAffirmativeorNegative("She went to the park today.")
      'Affirmative'
      """
output:     affirmative_words = ["always", "every", "all", "never", "none", "not", "no", "dont", "doesnt", "didnt", "wont", "cant", "shouldnt", "couldnt", "wouldnt"]
      sentence_lower = sentence.lower()
      for word in affirmative_words:
          if word in sentence_lower:
              return 'Negative'
      return 'Affirmative'