7
240 140
240 260
400 200
80 200
200 320
280 320
240 540
0 2 1 1 0 0 0
2 0 1 1 0 0 0
1 1 0 0 0 1 1
1 1 0 0 1 0 1
0 0 0 1 0 0 1
0 0 1 0 0 0 1
0 2 0 0 1 1 0
6
