x
3
x
3
x
2
x
3
x
2
x
2
x
3
x
2
x
2
x
3
x
2
x
2
x
3
x
2
x
3
x
3
0
9
1
9
2
8
3
8
4
7
5
8
6
9
7
6
8
4
9
4
10
3
11
3
12
2
13
2
14
1
15
1
x
2