10 7
0 7 11 7 18 6 17 8 4 10
0 0 20 6 13 2 5 7 15 17
0 0 0 20 18 17 20 1 8 11
0 0 0 0 17 5 7 19 1 13
0 0 0 0 0 16 19 16 9 8
0 0 0 0 0 0 20 20 14 15
0 0 0 0 0 0 0 14 3 16
0 0 0 0 0 0 0 0 18 5
0 0 0 0 0 0 0 0 0 2
0 0 0 0 0 0 0 0 0 0