8
180 120
180 360
420 120
420 360
300 360
60 360
60 600
300 600
0 1 0 0 0 2 0 0
1 0 2 0 2 1 0 0
1 2 0 0 0 0 0 0
0 0 1 0 1 0 0 2
0 2 0 1 0 0 2 1
2 1 0 0 0 0 0 0
0 0 0 0 2 1 0 0
0 0 0 2 1 0 1 0
4
