1	2	3	4	5	6	7	8	9	10
1	x	x	x	a	x	x	x	x	x	x
2	a	x	x	x	x	x	x	x	x	x
3	x	a	x	x	x	x	x	x	x	x
4	a	x	x	x	x	x	x	x	x	x
5	a	x	x	x	x	x	x	x	x	x
6	x	a	x	x	x	x	x	x	x	x
7	x	a	x	x	x	x	x	x	x	x
8	x	a	x	x	x	x	x	x	x	x
9	x	x	a	x	x	x	x	x	x	x
10	x	x	x	x	x	a	x	x	x	x
11	x	x	x	x	a	x	x	x	x	x
12	x	x	x	a	x	x	x	x	x	x
13	x	x	a	x	x	x	x	x	x	x
14	a	x	x	x	x	x	x	x	x	x
15	x	a	x	x	x	x	x	x	x	x
16	x	a	x	x	x	x	x	x	x	x
17	a	x	x	x	x	x	x	x	x	x
18	x	a	x	x	x	x	x	x	x	x
19	x	a	x	x	x	x	x	x	x	x
20	x	a	x	x	x	x	x	x	x	x
21	x	x	x	x	x	a	x	x	x	x
22	x	x	x	x	x	x	x	a	x	x
23	x	x	x	x	a	x	x	x	x	x
24	x	x	x	a	x	x	x	x	x	x
25	x	x	x	x	a	x	x	x	x	x
26	x	a	x	x	x	x	x	x	x	x
27	a	x	x	x	x	x	x	x	x	x
28	x	a	x	x	x	x	x	x	x	x