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