A:=[ [ 5, 7, -2, -3, 1, 4, 6, -8], [ 7, -2, 5, 8, -6, -3, -1, 4], [-4, -6, 5, 3, -2, 8, 1, 7], [ 3, -4, 6, 2, 5, -8, 7, -1], [ 5, -4, 6, 7, -3, 1, 2, -8], [ 1, 6, 2, -3, 5, 7, -4, -8], [ 1, -2, 7, -6, -8, 4, 3, 5], [ 5, -4, 6, 8, -7, 1, 2, 3]]: