------0----0----0--3-------------------------
----1---1----3-------3--1-0-------1-0--------
-2------------------------------------2-0---- x3 
---------------------------------------------
-0----0----3----3----------------------------
---------------------3----3----3----3--------

------0----0----0--3---------------0--5------
----1---1----3-------3--1-0------0-----------
-2-------------------------------------------      
---------------------------------------------
-0----0----3----3----------------------------
---------------------3----3----3----3--------