A:=[ [ 4, 5, 3,-1,-2,-6], [-1,-2, 4, 3, 5, 6], [-4,-5, 2, 6, 1, 3], [-1, 5, 6, 2,-3, 4], [ 2,-5,-3, 4, 1, 6], [ 3,-5,-2, 4, 6, 1], [ 1,-4, 3, 6, 5,-2]]: