docs: def cycle_find_app(_parser, cmd, args):  # pragma: no cover
      """
      Find the first position of a value in a de Bruijn sequence.
      """
  
      parser = argparse.ArgumentParser(
          prog=_parser.prog,
          description=_parser.description,
      )
      parser.add_argument('-w', '--width', type=int, default=4, help='the length of the cycled value')
      parser.add_argument('value', help='the value to determine the position of, read from stdin if missing', nargs='?')
      args = parser.parse_args(args)
      index = cycle_find(pwnypack.main.string_value_or_stdin(args.value), args.width)
      if index == -1:
          print('Not found.')
          sys.exit(1)
      else:
          print('Found at position: %d' % index)