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