2
strip
0
0
1
1
3
0
0
1
1
3
0
2
2
1
2
1
4
3
1
4
0
3
1
4
0
3
1
3
2
0
1
6
4
1
3
2
1
2
2
0
1
1
3
1
0
1
1
0
0
