Length distribution of mapped reads

len	T1S1	T1S2	T2S1	T2S2	T3S1	T3S2	T4S1	T4S2	T5S1	T5S2
18	808304	575147	530318	479673	510795	365072	493131	804069	385658	380250
19	858100	648475	487155	430648	518454	388537	372978	505329	476718	472038
20	561344	444751	284504	244039	353452	226180	247682	345487	298366	264235
21	432827	364347	296129	263481	331949	222678	190546	289376	285992	280433
22	829775	634674	599681	502656	471758	311312	330091	506210	407162	381501
23	285572	195286	195050	205957	393868	287182	169417	230287	246244	274895
24	97315	97834	57843	101640	65260	60257	74521	215018	92701	142853
25	7236	9998	6207	10709	5577	5350	4935	31391	12717	12579
26	2712	2608	2514	1617	2318	1870	2133	1640	5692	2119
27	52	62	39	8	25	16	56	47	126	59
28	5	5	3	5	5	0	8	3	31	6