0-0-1-3-3-1-0---------0-0---------
--------------3-1-1-3-----3-3-----
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0-0-1-3-3-1-0---------0-----------
--------------3-1-1-3---3-1-1-----
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----0-----0-1-0-----0-1-0---------
3-3---1-3-------1-3-------3-1-3---
--------------------------------0-
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0-0-1-3-3-1-0---------0-----------
--------------3-1-1-3---3-1-1-----
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