private static boolean a2 (int i, int j, BufferedImage image) {
      boolean left  = ((image.getRGB(i-1, j-1) == BLACK) ||
                       (image.getRGB(i-1, j  ) == BLACK) ||
                       (image.getRGB(i-1, j+1) == BLACK));
      
      boolean with  = ((image.getRGB(i, j-1) == WHITE) && 
                       (image.getRGB(i, j  ) == BLACK) &&
                       (image.getRGB(i, j+1) == WHITE));
      
      boolean right = ((image.getRGB(i+1, j-1) == BLACK) ||
                       (image.getRGB(i+1, j  ) == BLACK) ||
                       (image.getRGB(i+1, j+1) == BLACK));
      
      return ( left && with && right );
   }