text: import json
  import shutil
  import os
  from itertools import groupby
  import urllib.parse
  
  shutil.rmtree('fuzzy', ignore_errors=True)
  os.mkdir('fuzzy')
  
  with open('./vocab.txt') as fin:
      vocab = sorted([x.strip() for x in fin.readlines()])
  groupedby_prefix = dict((k, list(v))
                          for k, v in groupby(vocab, key=lambda x: x[:2]))
  
  for prefix in sorted(groupedby_prefix.keys()):
      if len(prefix) == 2:
          with open(f'fuzzy/{urllib.parse.quote_plus(prefix)}.json', 'w') as fout:
              json.dump(sorted(groupedby_prefix[prefix]), fout)
  