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