--------------------------------------------
--------------------------------------------
------7---------5-----------3----------5----
---7---------5----------3-----------5----5--
-5--------3--------1------------3----------- x2
----------------------------------------------------------------------------------------
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---7-7-----9-----10----5---3--------3-2--------7-7-----9-----10----5---3----5--5--------
---7-7-----9-----10----5---3----3-2------3-----7-7-----9-----10----5---3----5--5--------
---5-5-----7-----8-----3---1-------------------5-5-----7-----8-----3---1----3--3-------- x2
----------------------------------------------------------------------------------------
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