10
0 0 0 0 0 0 0 0 0 0
0 0 0 0 1 1 0 0 0 0
0 0 0 0 1 1 1 0 0 0
0 0 0 0 1 1 1 1 0 0
0 0 0 1 1 1 1 1 0 0
0 0 0 1 1 1 1 1 0 0
0 0 0 0 1 1 1 0 0 0
0 2 2 2 1 1 1 0 0 0
0 2 2 2 1 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0
5 2 5 9
5 2 8 7
5 2 9 8