input: def classify_text(text: str) -> str:
      """ Classify the given text document into either 'positive' or 'negative' sentiment.
      >>> classify_text("This is a great movie!")
      'positive'
      >>> classify_text("This movie was terrible")
      'negative'
      """
output:     positive_words = {"great", "awesome", "excellent", "good", "wonderful"}
      negative_words = {"terrible", "awful", "bad", "horrible", "disappointing"}
      
      words = text.lower().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'
      else:
          return 'negative'