[3a] - u [7u]-- [3s]-a-[7p]-O- [4p] - u [8u]-- [6p] p O O [8i] i u- [3a] - u [7u]-- [3s] s a a [7p] p O O [4p] - u [8u]-- [6p]--8-s- [2p]-p-[2p]-a s [4p]-p-[4p] p a s [6p]-p-[6p]-s- [8f]-g-[8f]-f d [9p]-p-[9p]-a s [qp]-p-[qp] p a s [3a] p O p a p O p [3a] p O p [7a] [7p] [7O] 7 [4g]-g-[4g]-h f 6--[6g] f d s [5d]-o a-d - [3f] - d [3p]-- [qg]-[qg]-[qg]-[qh] f 6--[0g] f d s [5d]-o a-d - [3f] - d [6p]