input: 
  def autocomplete(input_text: str) -> List[str]:
      """Given an input text, this function predicts and returns the top 5 completion words.
      The function uses a method to generate word candidates, filters them, ranks them,
      and returns the top 5 predictions.
      
      >>> autocomplete("hel")
      ["hello", "help", "helium"]
      >>> autocomplete("prog")
      ["program", "programming", "programmer"]
      """
      word_candidates = generate_candidates(input_text)
      filtered_words = filter_candidates(word_candidates)
      sorted_words = rank_words(filtered_words)
      return sorted_words[:5]
  
output:     def generate_candidates(prefix: str) -> List[str]:
          # Dummy implementation for generating word candidates
          return [prefix + 'lo', prefix + 'lp', prefix + 'lium', prefix + 'ram', prefix + 'ramming', prefix + 'ramer']
  
      def filter_candidates(candidates: List[str]) -> List[str]:
          # Dummy implementation for filtering candidates
          return [word for word in candidates if len(word) <= 10]
  
      def rank_words(words: List[str]) -> List[str]:
          # Dummy implementation for ranking words
          return sorted(words, key=lambda x: len(x))