---5-6-7-8----8-7-6-5----5-6-7-8-----8-7-6-5---------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
---5-6-7-8------7-8-----------6------------8-6-8-----------------
------------5-6-----5-6--10-9---6-9-8--8-6-----------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
---------7-8-----------6-----------------------------------------
---5-6-------5-6--10-9---6-9-8-8-8-8-8-8-8-6-8-10-----------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
-----------------------------------------------------------------
---------------8-------------------8-6-8--8-8-8-8-8-8-8--8-7-6-5-
--------10-8-6---8-8-8-6-8-10--8-6------------------------------
--^10-8---------------------------------------------------------
----------------------------------------------------------------
----------------------------------------------------------------
----------------------------------------------------------------