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