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