length	A	U	C	G
16	0	0	0	0
17	0	0	0	0
18	0	0	0	0
19	10	3	8	0
20	28	6	1	9
21	52	18	6	10
22	40	5	14	11
23	72	7	6	17
24	33	0	8	16
25	4	2	2	18
26	23	2	5	16
27	25	5	1	6
28	4	14	0	4
29	5	0	10	0
30	4	1	0	7
31	2	0	1	0
32	0	0	1	1
33	0	0	0	1
34	0	0	0	0
35	0	0	0	0
36	0	0	0	0
37	0	0	0	0
38	0	0	0	0
39	0	0	0	0
40	0	0	0	0
41	0	0	0	0
42	0	0	0	0
43	0	0	0	0
44	0	0	0	0
45	0	0	0	0
46	0	0	0	0
47	0	0	0	0
48	0	0	0	0
49	0	0	0	0
50	0	0	0	0