Length distribution of accepted reads

len	libAF16	libMirbase
18	808	0
19	1592	2
20	2080	2
21	3122	19
22	6058	33
23	11487	26
24	12089	8
25	10054	1
26	6922	1
27	3878	0
28	2082	0
29	1083	0
30	557	0


Length distribution of rejected reads

len	libAF16	libMirbase
31	330	0
32	191	0
33	105	0
34	77	0
35	58	0
36	41	0
37	21	0
38	23	0
39	12	0
40	8	0
41	8	0
42	3	0
43	2	0
44	3	0
45	3	0
46	1	0
48	1	0
49	1	0
58	1	0