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