8 1.0 1.0 1.0 1.0 1.0 -1.0 1.0 -1.0 1.0 1.0 -1.0 -1.0 -1.0 1.0 1.0 -1.0 1.0 -1.0 -1.0 -1.0 1.0 -1.0 -1.0 -1.0 12 0 1 2 3 4 5 6 7 0 2 2 6 0 4 4 6 1 3 3 7 1 5 5 7