1
2
3
4
5 5
6
7
8
9 9
1
2
3
4
5 5
6
7
8
9 9
0 0
0 0
0 0
5 5
1
2
3
4
6
7
8
9 9
0 0
0 0
0 0
1
2
3
4
5 5
6
7
8
9 9
0 0
0 0
0 0