input: 
  from typing import List
  
  def is_affirmative_or_negative(sentence: str) -> str:
      """Determine whether a given sentence is an affirmative sentence or a negative sentence.
      The function uses a list of negation words to identify if the sentence is negative.
      If no negation words are present, the sentence is considered affirmative.
      >>> is_affirmative_or_negative("He always comes late but I dont mind.")
      'Negative'
      >>> is_affirmative_or_negative("She is happy and content.")
      'Affirmative'
      """
      import nltk
      nltk.download('stopwords')
      from nltk.corpus import stopwords
  
      def find_negation(sentence: str) -> List[str]:
          negation_words = {'not', 'never', 'no', 'none', 'non', 'neither',
                            'nobody', 'nowhere', 'cannot', 'couldnt', 'shouldnt', 
                            'wouldnt', 'dont', 'didnt', 'hasnt', 'havent', 'isnt', 'arent'} 
          words = nltk.word_tokenize(sentence)
          neg = []
          for word in words:
              if word in negation_words:
                  neg.append(word)
          return neg
  
      negation_words = find_negation(sentence)
      if len(negation_words) == 0:
          return "Affirmative"
      else:
          return "Negative"
  
output:     import nltk
      nltk.download('stopwords')
      from nltk.corpus import stopwords
  
      def find_negation(sentence: str) -> List[str]:
          negation_words = {'not', 'never', 'no', 'none', 'non', 'neither',
                            'nobody', 'nowhere', 'cannot', 'couldnt', 'shouldnt', 
                            'wouldnt', 'dont', 'didnt', 'hasnt', 'havent', 'isnt', 'arent'} 
          words = nltk.word_tokenize(sentence)
          neg = []
          for word in words:
              if word in negation_words:
                  neg.append(word)
          return neg
  
      negation_words = find_negation(sentence)
      if len(negation_words) == 0:
          return "Affirmative"
      else:
          return "Negative"