p-p / | c p /| | c c p / | | c c p / / | c c p | / | c-c S-S-S | | | | f-f-f-f-S-S-S-r-r-r-r-L-L-L-L-L | | | | S-S-S W | | g W | | g W | | g W | | g W | | g-R-R-R-R-R-R-R-R-R-R