0
no smoking
1
5
4
2
1
2
2
2
3
5
0
1
2
1
3
3
4
2
2
1
1
4
3
1
0
1
3
4
1
2
1
1
4
3
1
1
1
4
2
3
1
1
2
1
2
1
2
1
2
