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0-------3-------------------0-------3--------------------------
---0-2-----2-0---0---0-2-------0-2----2-0---0---0--------------
-------4-------2---2-----4-4-------4------2---2---2-2----------
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--------0-1-1-0-1-0-1-0----------0-1-1-0-1-0-1-0---3-3-0-0-----
-2-2-2-2----------------2-2-2-2-2-----------------2------------
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-2-2-0-2-0-2-0-2-------------
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