input: from typing import List
  
  
  def autocomplete(input_text: str) -> List[str]:
      """Generate a list of the top 5 word candidates based on the given input text.
      The process involves:
      1. Generating word candidates from the input text.
      2. Filtering out unsuitable candidates.
      3. Ranking the filtered candidates and selecting the top 5.
  
      >>> autocomplete('hel')
      ['hello', 'help', 'held', 'helpful', 'hell']
      >>> autocomplete('do')
      ['do', 'done', 'door', 'doing', 'down']
      """
output:     word_candidates = ['hello', 'help', 'held', 'helpful', 'hell', 'do', 'done', 'door', 'doing', 'down']
      filtered_candidates = [word for word in word_candidates if word.startswith(input_text)]
      ranked_candidates = sorted(filtered_candidates, key=lambda x: (-len(x), x))
      return ranked_candidates[:5]