|< ww >|           |< we >|

-  +------+-----------+------+
^  |      |           |      |
hn |      |           |      |
V  |      |           |      |
-  +------+-----------+------+
   |      |           |      |
   |      |           |      |
   |      |           |      |
   |      |           |      |
-  +------+-----------+------+
^  |      |           |      |
hs |      |           |      |
V  |      |           |      |
-  +------+-----------+------+