3
natural
1
3
3
1
1
1
3
3
1
2
2
2
2
0
2
3
4
2
4
2
2
2
1
2
2
3
4
0
1
1
1
5
0
0
4
7
1
2
1
1
0
2
3
4
1
2
1
2
4
