This is cutadapt 2.8 with Python 3.7.4 Command line parameters: -a C{9} -m 20 -o TP14.trim.fastq TP14.fastq Processing reads on 1 core in single-end mode ... Finished in 1.22 s (22 us/read; 2.75 M reads/minute). === Summary === Total reads processed: 55,841 Reads with adapters: 6,242 (11.2%) Reads that were too short: 688 (1.2%) Reads written (passing filters): 55,153 (98.8%) Total basepairs processed: 3,406,301 bp Total written (filtered): 3,281,511 bp (96.3%) === Adapter 1 === Sequence: CCCCCCCCC; Type: regular 3'; Length: 9; Trimmed: 6242 times; Reverse-complemented: 0 times No. of allowed errors: 0-9 bp: 0 Bases preceding removed adapters: A: 44.7% C: 0.0% G: 21.7% T: 33.5% none/other: 0.0% Overview of removed sequences length count expect max.err error counts 3 812 872.5 0 812 4 440 218.1 0 440 5 292 54.5 0 292 6 261 13.6 0 261 7 214 3.4 0 214 8 188 0.9 0 188 9 162 0.2 0 162 10 165 0.2 0 165 11 152 0.2 0 152 12 136 0.2 0 136 13 141 0.2 0 141 14 133 0.2 0 133 15 154 0.2 0 154 16 145 0.2 0 145 17 123 0.2 0 123 18 107 0.2 0 107 19 131 0.2 0 131 20 117 0.2 0 117 21 138 0.2 0 138 22 112 0.2 0 112 23 101 0.2 0 101 24 105 0.2 0 105 25 100 0.2 0 100 26 81 0.2 0 81 27 109 0.2 0 109 28 97 0.2 0 97 29 100 0.2 0 100 30 81 0.2 0 81 31 68 0.2 0 68 32 86 0.2 0 86 33 72 0.2 0 72 34 75 0.2 0 75 35 57 0.2 0 57 36 63 0.2 0 63 37 69 0.2 0 69 38 39 0.2 0 39 39 37 0.2 0 37 40 43 0.2 0 43 41 48 0.2 0 48 42 45 0.2 0 45 43 35 0.2 0 35 44 43 0.2 0 43 45 29 0.2 0 29 46 39 0.2 0 39 47 38 0.2 0 38 48 56 0.2 0 56 49 61 0.2 0 61 50 45 0.2 0 45 51 39 0.2 0 39 52 33 0.2 0 33 53 20 0.2 0 20 54 119 0.2 0 119 55 43 0.2 0 43 56 16 0.2 0 16 57 7 0.2 0 7 58 6 0.2 0 6 59 7 0.2 0 7 60 4 0.2 0 4 61 3 0.2 0 3