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