[[0,0],[1,0],[0,1],[-4,1]]
[[0,0],[1,0],[1,2],[2,2],[0,-1]]
[[0,0],[1,0],[1,5]]
[[0,0],[1,0],[2,5]]
[[0,0],[2,0],[0,1],[-3,1]]
[[0,0],[1,0],[2,3],[2,1]]
