7
2 0
1 0
1 1
2 0
1 1
1 0
2 1
1 1
1 0
3 0
1 1
3 1
2 0
3 1
1 1
3 1
2 0
6 2
6 1
9 1
5 0
3 1
4 0
8 1
20 4
7 1
3 0
10 0
13 1
4 1
2 1
12 1
4 1
3 1
14 1
2 0
8 0
13 0
8 1
5 1
13 1
12 1
13 0
2 0
6 1