+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|     |     |     "     |     |     "           |     |
|     |  9  |     "     |  4  |     " -     -   | -   |
|     |     |     "     |     |     "           |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|     |     |     "     |     |     "           |     |
|  2  |  7  |  3  "  1  |  2  |  3  " -     -   | -   |
|     |     |     "     |     |     "           |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|     |     |     "     |     |     "           |     |
|     |  5  |     "     |     |     " -     -   | -   |
|     |     |     "     |     |     "           |     |
+=====+=====+=====+=====+=====+=====+-----+-----+-----+
|     |     |     "     |     |     "           |     |
|     |     |     "  2  |  9  |     " -     -   | -   |
|     |     |     "     |     |     "           |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|     |     |     "     |     |     "           |     |
|     |     |     "     |     |     " -     -   | -   |
|     |     |     "     |     |     "           |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|     |     |     "     |     |     "           |     |
|     |  4  |  7  "     |     |     " -     -   | -   |
|     |     |     "     |     |     "           |     |
+=====+=====+=====+=====+=====+=====+-----+-----+-----+
|     |     |     "     |     |     "           |     |
|     |     |     "     |  9  |     " -     -   | -   |
|     |     |     "     |     |     "           |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|     |     |     "     |     |     "           |     |
|  1  |  7  |  9  "  1  |  7  |  8  " -     -   | -   |
|     |     |     "     |     |     "           |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|     |     |     "     |     |     "           |     |
|     |  6  |     "     |  3  |     " -     -   | -   |
|     |     |     "     |     |     "           |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+