x---- x---- [Ox] p a-- O p a-- [Ox] p a f d s a s p a O p [Ox] I u-y- u--- x---- x---- [ux] p a-- [OH] [pj] [ak]-- [uH] [pj] [ak] [sl] [ak] [pj] [ak] [pj] [OH] i u- [OH] [pj] [ak] [sl] [ak] [pj] [ak] [pj] [OH] [ij] [uk] [rz] [el] z [ox]-i- [ul] z x-b- [iz]-o-x- [px]-a x x x [ux]-I x [Ox] x [px] x [ax] x [dx] x x - j j j j - j j j j - j j j j - j j j [ix] - j j j j - j j j x - j j j j - j j j x---- x