[0d]-- [qf]---- [0d]---[0d]- [qf]---- [0d]-- [qf]---- [4f]---- [3f]---- [3O]- [3O] - [3O]-[3O] [4p]-[4p] - [4p]-[4p] [5a] - [5a] [4p]-[4p] - [3O]-[4p] [3O]-- [3O]-[3O] - [3O]-[3O] [4p]-[4p] - [4p]-[4p] [5a] - [5a] [4p]-[4p] - [3O]-[4p] [3O]-a- f 3-4 [3f]-u- [2y] - u [2i]-[2u] y [3u]yu---u- [2i] - o [2p]-[2p] a [3O]---- [2y] - u [2i] u [2i] o [6p]-a s [6a]-[6p] o [4i]---[4p]- [3a]-[3O] - [4p]-[4p] [3a]-[3O] - [4s]-[4s] [3a] - [4s] [3d] - [4g] [3f]---- a- [3f]-3 - [3f] d [3a] [4s]ds 4 - [4s] a [4p] [5a] - [5a]s[4p]-4 ps O 3-4 3-a- [3f]-3 a d 3-[3a] [4s] a [4p]--p- [2i]-i o p-6- [2p]-p a [2s]-2- f 3-4 3-a- f 3-4 3-a- [2d]---- [2i]---- 2---- [3f]---- [3f]-[2d] [3f]---- [3u]--3-[3a] o [5p] o a-o-5- [4p] - 5 [7p] 6 [5p] 6 [$p]---- y