e-e e-e e-e e e e e-e e-e e-e e e e [:e'e]-e e-e [:e'e]-e [:e'e] 0 w [6e]-e 6 e r [4t]-t 4 t y [3r]-r 3 e w [6w] e-6 0 w [4e]-e 4 e r [1t]-t 1 t y [5r]-r 3 e w [6e] - 6 0 w [6e]-e 6 e t [4y]-y 4 y u [2i]-i 2 u y [6u] e-6 e r [4t]-t 4 y-[6u] e-6 e t [3r]-r 3 t e [3r] - 3 u o [6p]-p 6 p a [4s]-s 4 s d [3a]-a 3 p o [6o] p-6 u o [4p]-p 4 p a [1s]-s 1 s d [5a]-a 3 p o [6p] - 6 u o [6p]-p 6 p s [4d]-d 4 d f