1 
0 
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
2 1
2 1
1 0
1 0
1 0
1 0
1 0
1 0
2 1
2 1
1 0
1 0
1 0
1 0
1 0
1 0
1 0
1 0
