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