6---- 4---- 5---- 3---- 6--y y-t y-t y-t y- t y - 4-- y y-t y-t y- t y-t y - 5--y y-t y-t y-t y- t y - 3-- y-t y-t y- t y-t y-t e - 6--p p- o p-o p-o p-o y-t 4-- p p-o p- o p-o p-o y- t - 5-- p p-o p-o p- o p-o y-t - 3-p p-o p-o p-o p- o y-t-t y- 6---- e-r t e-r t [4e]---t- [5r]---y- [3e]--3-- 6