x Ascending |--------------------------------------8-| |------------------------------8-10-11---| |-------------------------8-10-----------| |-----------------8-10-12----------------| |---------8-10-12------------------------| |-8-10-11--------------------------------| Descending |--------------------------------------| |-11-10-8------------------------------| |---------10-8-------------------------| |--------------12-10-8-----------------| |----------------------12-10-8---------| |------------------------------11-10-8-|