This is cutadapt 2.8 with Python 3.7.4 Command line parameters: -a C{9} -m 20 -o TP13.trim.fastq TP13.fastq Processing reads on 1 core in single-end mode ... Finished in 1.36 s (17 us/read; 3.61 M reads/minute). === Summary === Total reads processed: 81,929 Reads with adapters: 8,698 (10.6%) Reads that were too short: 780 (1.0%) Reads written (passing filters): 81,149 (99.0%) Total basepairs processed: 4,997,669 bp Total written (filtered): 4,829,710 bp (96.6%) === Adapter 1 === Sequence: CCCCCCCCC; Type: regular 3'; Length: 9; Trimmed: 8698 times; Reverse-complemented: 0 times No. of allowed errors: 0-9 bp: 0 Bases preceding removed adapters: A: 46.6% C: 0.0% G: 19.2% T: 34.1% none/other: 0.1% Overview of removed sequences length count expect max.err error counts 3 1076 1280.1 0 1076 4 596 320.0 0 596 5 431 80.0 0 431 6 390 20.0 0 390 7 301 5.0 0 301 8 260 1.3 0 260 9 249 0.3 0 249 10 211 0.3 0 211 11 227 0.3 0 227 12 216 0.3 0 216 13 218 0.3 0 218 14 193 0.3 0 193 15 181 0.3 0 181 16 173 0.3 0 173 17 183 0.3 0 183 18 190 0.3 0 190 19 171 0.3 0 171 20 169 0.3 0 169 21 167 0.3 0 167 22 156 0.3 0 156 23 170 0.3 0 170 24 153 0.3 0 153 25 177 0.3 0 177 26 145 0.3 0 145 27 155 0.3 0 155 28 142 0.3 0 142 29 135 0.3 0 135 30 128 0.3 0 128 31 102 0.3 0 102 32 107 0.3 0 107 33 120 0.3 0 120 34 97 0.3 0 97 35 79 0.3 0 79 36 88 0.3 0 88 37 87 0.3 0 87 38 82 0.3 0 82 39 62 0.3 0 62 40 67 0.3 0 67 41 64 0.3 0 64 42 51 0.3 0 51 43 73 0.3 0 73 44 63 0.3 0 63 45 56 0.3 0 56 46 48 0.3 0 48 47 61 0.3 0 61 48 64 0.3 0 64 49 54 0.3 0 54 50 43 0.3 0 43 51 47 0.3 0 47 52 27 0.3 0 27 53 13 0.3 0 13 54 95 0.3 0 95 55 33 0.3 0 33 56 14 0.3 0 14 57 10 0.3 0 10 58 5 0.3 0 5 59 6 0.3 0 6 60 7 0.3 0 7 61 10 0.3 0 10