----5--------------5-------------------5-------------------5---------|
----5----3----5----5----3----6----5----5----3----5----3----5---------|
---------3----5---------3----6----5---------3----5----3--------------| X6
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---3----------3----------3----------3----------3-----------1---------|
------5----------5----------5----------5----------5-----------3------|
---------5----------5----------5----------5----------5-----------3---| X6
---------------------------------------------------------------------|
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