j---g l k---- h- x x-z-x-l k j---- j---l j k--- h h h x-z z-x-l k j---- j l j lj ljlj l k z k zk zkzk z x - v-b-x zlj-z-x - j l j lj ljlj l k z k zk zkzk z x - v-b-x zlj-xzlzx - h j j j j j l j k k j jkh - h x x z z z x x l l l k-j-- j j-j - l j k k j j-h - x - v-b-z zlj--x - j l j lj ljlj l k z k zk zkzk z x - v-b-x zlj-z-x