s s [6s] - a [3d] s-u 6--3-s s [9s] - a [6d]-s i 9--6-d d [3d]-s-7-s a [3u]--[7d]-s- [6a]-s u 3-s s [6s] - a [3d] s-u 6--3-s s [9s] - a [6d]-s i 9--6-d d [3d]-s-7-s a [3u]--[7d]-s- [6a]-s u 3-s s [6s] - a [3s] a-u 6--3-P P [5P] p - [6g]-f p 9--6 f-f [9f]-d-6-d s [0a]--[7d]-s- [6a]-s-[3p]-- [6s] s - [3s] s - [6s] s - 3-d s [9s] - a [6a] a - [9a]--6-d d [3d] - d [7d] d-d 3-s-[7s]-a- [6u]--[3a] s - [6s] s - [3s] s - [6s] s - 3-d s [9s] - a [6a] a - [9a]--[6a]-s- [3a]-p-[7p]-p- [3O]-u-[7s]-u- [6p]--3-- 6--[3s] s