code: def step_1b_helper(word):
      if (
          word.endswith("at")
          or word.endswith("bl")
          or word.endswith("iz")
      ):
          return word + "e"
      if ends_with_double(word):
          return word[:-1]
      if is_short_word(word):
          return word + "e"
      return word
  
imports: import re
label_desc: Use image node_id 10 for calling a global function with example usage: step_1b_helper(word) and returns: word, unknown, word, unknown