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