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