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