length	A	U	C	G
16	0	0	0	0
17	1	0	0	0
18	0	0	0	2
19	1	0	1	0
20	4	1	0	1
21	0	0	0	2
22	0	1	0	1
23	0	1	1	1
24	1	0	0	1
25	2	0	0	1
26	1	0	0	1
27	1	0	0	1
28	0	0	0	0
29	2	0	0	0
30	0	0	0	0
31	0	0	0	0
32	0	0	0	0
33	1	0	0	0
34	0	0	0	1
35	0	0	0	0
36	1	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