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((4, 2, 0, 0),( 2, 2, 0, 0),( 0, 0, 4, 4),( 0, 0, 1, 2))
((4, 2, 0, 0),( 2, 2, 0, 0),( 0, 0, 4, 4),( 0, 0, 1, 2))
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