length	A	U	C	G
16	0	0	0	0
17	3	2	0	0
18	13	0	3	1
19	83	0	7	0
20	216	8	35	13
21	210	63	31	69
22	356	123	75	71
23	410	51	16	90
24	335	20	35	124
25	290	48	27	38
26	164	32	32	22
27	54	34	15	58
28	186	16	27	50
29	50	27	13	42
30	53	30	5	14
31	19	11	6	11
32	12	0	0	1
33	2	3	0	1
34	9	0	0	0
35	0	0	0	1
36	1	0	1	0
37	0	0	0	0
38	0	0	0	0
39	0	0	0	0
40	0	0	0	0
41	1	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