7
1
1
1
8
7
1
9
0
0
7
0
0
9
9
1
0
8
8
7
9
7
8
1
9
1
9
9
9
8
8
9
0
8
1
7
0
0
8
8
7
0
7
9
1
7
0
8
7
1