0 1
2 1
0 1
1 1
0 1
2 1
0 1
2 1
0 1
3 1
0 1
2 1
0 1
2 1
0 1
1 1
0 1
2 1
0 1
2 1
0 1
3 1
0 1
2 1
0 1
2 1
0 1
1 1
0 1
2 1
0 1
