----------------------------- ----------------------------- ----------------------------- ----------------------------- -------9--9--11--11--9--7-7-- -7--7------------------------ ----------------------------- ----------------------------- ----------------------------- ----------------------------- -6--6--4--4--2--6--6--4--4--- ----------------------------- ----------------------------- ----------------------------- ----------------------------- ----------------------------- -2--2--0--6--6--4--4--2--2-0- -----------------------------