static S ocr_terminalContents() {
  new L<S> lines;
  
  BufferedImage img = shootScreen2();
  Rect r = ocr_findTerminalBackground(new RGBImage(img));
  if (r == null) null;
  final BufferedImage terminal = clipBufferedImage(img, r);
  ocr_terminalInvert1(terminal);
  LL<Rect> rects = ocr_makeTerminalGrid(terminal);
  BWImage bw = new BWImage(terminal);
  bw = bwAutoContrastAllRects(bw, concatLists(rects), 1f);
  for (L<Rect> row : rects) {
    L<S> chars = ocr_recognizeMultiLine(bw, row);
    new StringBuilder buf;
    for (S s : chars)
      buf.append(empty(s) ? " " : l(s) == 1 ? s : ocr_unknownCharacterPlaceholder());
    lines.add(str(buf));
  }
  ret lines(lines);
}