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