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