Length distribution of accepted reads

len	libCE1	libMirbase
18	1114	1
19	3758	2
20	10096	10
21	32811	27
22	66336	51
23	33675	44
24	15754	16
25	6330	4
26	5820	1
27	2761	0
28	1504	0
29	825	0
30	507	0


Length distribution of rejected reads

len	libCE1	libMirbase
31	231	0
32	148	0
33	74	0
34	37	0
35	17	0
36	17	0
37	9	0
38	10	0
39	3	0
40	4	0
41	3	0
43	2	0
47	1	0
49	1	0
50	1	0