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