intro: ----------------------------------------------------------- ----------------------------------------------------------- ----------------------------------------------------------- -0----------/4-4-4p2p0---------/5-------------------------- ---2p0-----------------2---0h2----------------------------- -------3-----------------3--------------------------------- ----------------------------------------------------------- ----------------------------------------------------------- -/6-6-6\4-4-4\2-2------------------------------------------ -/7-7-7\5-5-5\4-0-----0-----------0------------------------ --------------------2---2p0---0h2-------------------------- ----------------------------2------------------------------