0.0  6.0
1.0  4.0
3.0  4.0
1.0  2.0
3.0  2.0
0.0  0.0
5.0  4.0
7.0  5.0
9.0  5.0
7.0  2.0
9.0  2.0
7.0  0.0
9.0  0.0