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