--------------------------------------
--------------------------------------
--------------------------------------
--------2--2--------------------------
--2--2--------3-----------------------
-------------------5--0---------------

--------------------------------------
--------------------------------------
--------------------------------------
------2--2---3------------------------
-2--2-----------5---------------------
-------------------5------------------


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---------------------------------------
---------------------------------------
-------4-------------------------------
-5--5-----5----------------------------
-------------5-------------------------

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------2--2---2------------------------
-3--3---------------------------------
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