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