13w
 +-----------------+
8|     r     r   r |
7| r H   r         |
6| d     c     r   |
5|   r   h c   h d |
4|   r E           |
3| R D m e C       |
2|   R H M C D   R |
1|     R     R R R |
 +-----------------+
   a b c d e f g h