1----------------------------------------------
2|--6-----------6-5-3-5-------3-4-3------------------------
3|-----7------7----------6----------5-3-2--2-3--5--5-3-2-3-
4|-------7--7--------------7-------------------------------
5----------------------------------------------
6----------------------------------------------
1|-7-----------7-5-3-5-------------------------------------
2|----8------8----------6----6----9--9-9-6---6-6-5-3-5-----
3|------8--8--------------7-----7----------7---------------
4----------------------------------------------
5----------------------------------------------
6----------------------------------------------