9w
 +-----------------+
8|   r   r c r r r |
7| r               |
6|       c         |
5| R r r h C H h d |
4| d   E           |
3| R D m e C       |
2|   R H M   D   R |
1|     R     R R R |
 +-----------------+
   a b c d e f g h