[4u]----i [6u]----i [5y]----y [6T] - T r - T [4u]----i [6u]----i [5o]---o- [6p] - p o-i- [1f] g h g f - i [3f] g h j h g f i [2d] f g f d f d y [!d] f g f d S a p [1f] d f g f - i [3f] d f g h g f i [2f] d f g h g h j [!h] j k j h g f d [1m]---- [3n]--b-- [2v]--c-- [!x]--z-- [1m]---- [3n]--b-- [2v]--c-- [!x]--l-- [1m] y u i u y t- [3n] y u i b y t- [2v] t y u c t r t [!x] r e r z w e- [1m] y u i u y t- [3n] y u i b y t- [2v] t r e c q 0 q [!x] 9 0 9 l-- 1---- 3---- 2---- !---- 1---- 3---- 2---- !---- [1f] s f s f s f s [3f] s f s f s f s [2g] d g d g d g d [!f] S f S f S f- [1f] s f s f s f s [3f] s f s f s f s [2g] d g d g d g d [1f] s f d s