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