1-------------------------------------------
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3-6-6-7-9-9-7-6-4-2-2-4-6-6---4-------------
4-------------------------------------------
5-0-0-0-0-0-0-0-0-0-0-0-0-------------------
6-------------------------0---0-------------
1-------------------------------------------
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3-6-6-7-9-9-7-6-4-2-2-4-6-4--2--------------
4-------------------------------------------
5-0-0-0-0-0-0-0-0-0-0-0-0----0--------------
6-------------------------0-----------------