8
180 300
60 420
300 420
180 540
420 300
420 540
300 180
60 180
0 1 1 2 0 0 1 2
1 0 0 0 0 0 0 2
1 0 0 1 2 2 2 0
0 1 1 0 0 0 0 0
0 0 2 0 0 2 0 0
0 0 2 0 0 0 0 0
1 0 0 0 1 0 0 0
2 0 0 0 0 0 0 0
0
