------------------------------------
 4-2-2----4-4-2-2----2-0-0-----0-2-0-
 --------------------------0-4-------
 ------------------------------------

 -------------------------------
 4-2-2----4-4-2-2---0-2-0-2-0-4-
 -------------------------------
 -------------------------------

 --2-2---------------0---2-2-0---0-----
 0-----0-0-0---0-2-4---4-------4---4-2-
 ------------2-------------------------
 --------------------------------------

 --2-0---0-2-----0-2-7-6---
 0-----4-----4-4---------4-
 --------------------------
---------------------------