9
1
7
9
2
7
9
3
4
5
7
9
4
5
7
9
5
7
9
7
9
7
8
9
8
9
9
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0