0
oil
1
1
1
2
1
3
3
1
2
3
1
2
3
3
1
2
1
2
2
0
3
2
4
1
1
1
2
2
3
1
1
2
1
3
1
0
4
2
2
2
1
1
1
1
3
1
2
1
1
