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