input: 
  def autocomplete(input_text: str) -> List[str]:
      """
      Given an input text, generate word candidates and return the top 5 predicted words.
      
      >>> autocomplete("Hel")
      ['Hello', 'Help', 'Helmet', 'Helium', 'Helix']
      >>> autocomplete("Pro")
      ['Program', 'Progress', 'Project', 'Product', 'Professional']
      """
      # Generate the word candidates
      word_candidates = generate_candidates(input_text)
      # Filter the word candidates 
      filtered_words = filter_candidates(word_candidates)
      # Rank the words and return the top 5 
      sorted_words = rank_words(filtered_words)
      return sorted_words[:5]
  
output:     def generate_candidates(input_text: str) -> List[str]:
          # Dummy implementation for generating candidates
          return [input_text + 'lo', input_text + 'lp', input_text + 'met', input_text + 'ium', input_text + 'ix']
  
      def filter_candidates(word_candidates: List[str]) -> List[str]:
          # Dummy implementation for filtering candidates
          return word_candidates
  
      def rank_words(filtered_words: List[str]) -> List[str]:
          # Dummy implementation for ranking words
          return sorted(filtered_words)