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