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