3
natural
3
1
2
1
2
3
2
6
1
3
2
1
1
3
3
3
3
3
2
4
1
1
3
2
2
1
0
0
3
3
3
3
3
4
1
3
3
2
3
2
3
3
2
2
3
3
4
3
2
