static MultiMap<String, Rectangle> irParseHashes(S result) {
  MultiMap<S, Rectangle> hashToRect = new MultiMap;
  Matcher matcher = Pattern.compile("(\\d+, *\\d+, *\\d+, *\\d+) -> ([0-9a-zA-Z\\.]+)").matcher(result);
  while (matcher.find()) {
    Rectangle r = RectUtil.stringToRect(matcher.group(1));
    String hash = matcher.group(2);
    hashToRect.put(hash, r);
  }
  ret hashToRect;
}