code: def _parse_seq_preheader(line):
      
      match = re.match(r"\$ (\d+) = (\d+) \( (\d+) \):", line, re.VERBOSE)
      if not match:
          raise ValueError("Unparseable header: " + line)
      index, this_len, query_len = match.groups()
      return map(int, (index, this_len, query_len))
docs: $3=227(209):