8
480, 80, 140, 80, 2
140, 0, 480, 80, 3
0, 0, 140, 100, 0
0, 100, 300, 300, 0
0, 400, 140, 140, 0
0, 540, 260, 120, 1
260, 420, 220, 220, 1
480, 160, 140, 450, 2