+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|     |     |     "     |     |     "     |     |     |
|    <<<   <<<    "    <<<    |  2  "    <<<   <<<    |
|     |  ^  |     "  v  |     |     "  v  |     |  ^  |
+-----+--^--+-----+--v--+-----+-----+--v--+-----+--^--+
|     |  ^  |     "  v  |     |     "  v  |     |  ^  |
|     |     |     "    >>>    |     "     |    >>>    |
|     |  ^  |     "  ^  |     |     "  v  |     |     |
+-----+--^--+-----+--^--+-----+-----+--v--+-----+-----+
|     |  ^  |     "  ^  |     |     "  v  |     |     |
|     |     |     "    <<<    |     "     |     |     |
|     |     |     "     |     |     "     |     |     |
+=====+=====+=====+=====+=====+=====+=====+=====+=====+
|     |     |     "     |     |     "     |     |     |
|     |     |     "     |     |    <<<    |     |     |
|     |     |  ^  "     |     |  v  "  ^  |     |     |
+-----+-----+--^--+-----+-----+--v--+--^--+-----+-----+
|     |     |  ^  "     |     |  v  "  ^  |     |     |
|  3  |     |     "     |     |     "     |     |  6  |
|     |     |  ^  "     |     |     "  ^  |     |     |
+-----+-----+--^--+-----+-----+-----+--^--+-----+-----+
|     |     |  ^  "     |     |     "  ^  |     |     |
|     |     |    <<<    |     |    >>>    |     |     |
|     |     |     "     |     |     "     |     |     |
+=====+=====+=====+=====+=====+=====+=====+=====+=====+
|     |     |     "     |     |     "     |     |     |
|    >>>   <<<    "     |    <<<    "     |    >>>    |
|  ^  |  v  |  ^  "     |  v  |     "     |  ^  |     |
+--^--+--v--+--^--+-----+--v--+-----+-----+--^--+-----+
|  ^  |  v  |  ^  "     |  v  |     "     |  ^  |     |
|     |     |     "     |    >>>    "     |     |  5  |
|  ^  |     |  ^  "     |  ^  |     "     |  ^  |     |
+--^--+-----+--^--+-----+--^--+-----+-----+--^--+-----+
|  ^  |     |  ^  "     |  ^  |     "     |  ^  |     |
|     |  4  |     "     |    <<<    "     |     |     |
|     |     |     "     |     |     "     |     |     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+