text: import msgpack
  
  with open('data/synonyms.msgpack', 'r') as f:
      SYNONYMS = msgpack.load(f, use_list=False)
  
  
  def cached_synonyms(x, length=None):
      x = x.lower()
      if x in SYNONYMS:
          syns = [s for s in SYNONYMS[x] if (not length) or (len(s) <= length)]
          return set(syns)
      else:
          return set([])
  