1--------------------------------------------------------
2--------------------------------------------------------
3------------------------------9-------------------------
4---11-11--9-9--7-7--9-9--11-11--11----------------------
5--------------------------------------------------------
6--------------------------------------------------------
1--------------------------------------------------------
2--------------------------------------------------------
3-------------------------------9---11---9--9---9--9-----
4---11-11--9-9--7-7--9-9--11--11--11---11--12-11-12------
5--------------------------------------------------------
6--------------------------------------------------------
1--------------------------------------------------------
2---------10--12-----------------------------------------
3----9--9------------------------------------------------
4--11-11------------------------------------------------
5--------------------------------------------------------
6--------------------------------------------------------