// keys are md5s

static Map<S, BWImage> getLearnedCharacters2() {

  Set<S> md5s = requiredPhraseImageMD5s();

  new HashMap<S, BWImage> md5ToImage;

  int nFound = 0;

  for (S md5, File f : screenClipFilesContainedInMD5Set(md5s)) {

    ++nFound;

    BWImage img = loadBWImage(f);

    //md5ToImage.put(md5, img);

    for (BWImage cImg : horizontalAutoSplitToImages(img)) {

      S cMD5 = ocrMD5OfBWImage(cImg);

      md5ToImage.put(cMD5, cImg);

    }

  }

  print("Loaded phrase images: " + nFound + "/" + l(md5s));

  ret md5ToImage;

}