input: 
  def analyze_sentiment(text: str) -> str:
      """Analyze the sentiment of given text and categorize it into positive, negative, or neutral sentiment.
      >>> analyze_sentiment("I am really happy today.")
      'positive'
      >>> analyze_sentiment("This was a terrible experience.")
      'negative'
      >>> analyze_sentiment("I have no strong feelings about this.")
      'neutral'
      """
  
output:     positive_words = ["happy", "good", "great", "awesome", "wonderful"]
      negative_words = ["terrible", "bad", "awful", "horrible", "disappointing"]
      
      text = text.lower()
      words = text.split()
      
      positive_count = sum(1 for word in words if word in positive_words)
      negative_count = sum(1 for word in words if word in negative_words)
      
      if positive_count > negative_count:
          return 'positive'
      elif negative_count > positive_count:
          return 'negative'
      else:
          return 'neutral'