s s s s-p u o- i i--- [ad] [ad] [ad] [ad]-[od] [yd] [us]---- [uf] [ud] [us] [us]-[ps] [sf] [af]- [pd] [pd]-d d d [sd]- [ad] [ad]--[oa] a- [ps] - [ps] [ps] s [pf]- [of]---[us] [of]- [id] - [id] [id] [us] - [us] [yP] [yP]---- [yP] [yP]-[up]---- u I o-u y---- [uo] [ip]-[oa]-- iu-y---- [uo] [ip]-[oa]---- i u-y