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