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