3
natural
4
2
4
2
2
2
1
2
2
3
4
0
1
1
1
5
0
0
1
4
7
1
2
8
1
1
0
1
2
3
4
1
2
1
2
4
1
4
2
2
2
1
1
2
2
1
4
1
2
