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{0,1} {-1,0,2} {-1,0,1,2} {-1,0,1}
{0,1} {﹣1,0,1,2} {﹣1,0,2} {﹣1,0,1}
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{0,1} {-1,0,1} {0,1,2} {-1,0,1,2}
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(-2,2) (1,2) -1,0,1 -2,-1,0,1,2