0 - w a-I u 8 - 8 w-5 w 0-- x-- 0-- f x - [0a] I u [wt] [8o] p o [8t] [wu] I [5o] [wI] [0u]-- x-- 0-- f x - [ea] I u [0o] o p o u [wo] f u [0f] [0u]-- x-- 0-- f x - [ra] I a [uf] h j h f [tk] G j [rh] f-- x-- r-- f x - [rf] x p [ex] [ts] x a [rx] o x x x x-- x-- 0-- f x