input: 
  def analyze_sentiment(text: str) -> str:
      """Analyze the sentiment of the given text and categorize it into 
      positive, negative, or neutral sentiments.
      
      >>> analyze_sentiment("I am so happy today!")
      'positive'
      >>> analyze_sentiment("I feel awful.")
      'negative'
      >>> analyze_sentiment("The weather is okay.")
      'neutral'
      """
  
output:     positive_words = ["happy", "joy", "good", "great", "excellent"]
      negative_words = ["awful", "bad", "terrible", "horrible", "sad"]
      
      text = text.lower()
      words = text.split()
      
      positive_count = sum(word in positive_words for word in words)
      negative_count = sum(word in negative_words for word in words)
      
      if positive_count > negative_count:
          return 'positive'
      elif negative_count > positive_count:
          return 'negative'
      else:
          return 'neutral'