-0-2-0----0-2-0-----7-7-4-4-5-5-0--
------2---------2------------------
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-2-2-5-4-2---0-2-0-------2-2-5-4-2-
-------------------2-2-------------
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-2-2-5-4-2---0-2-0-----------------
-------------------2-2-------------
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-7-7-10-7-4-5-9---5-----0----------
--------------------5-----3-0------
----------------------6-------2----
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