This is cutadapt 2.8 with Python 3.7.4 Command line parameters: -a C{9} -m 20 -o TP10.trim.fastq TP10.fastq Processing reads on 1 core in single-end mode ... Finished in 1.43 s (17 us/read; 3.51 M reads/minute). === Summary === Total reads processed: 83,864 Reads with adapters: 9,787 (11.7%) Reads that were too short: 733 (0.9%) Reads written (passing filters): 83,131 (99.1%) Total basepairs processed: 5,115,704 bp Total written (filtered): 4,933,206 bp (96.4%) === Adapter 1 === Sequence: CCCCCCCCC; Type: regular 3'; Length: 9; Trimmed: 9787 times; Reverse-complemented: 0 times No. of allowed errors: 0-9 bp: 0 Bases preceding removed adapters: A: 46.0% C: 0.0% G: 18.8% T: 34.9% none/other: 0.2% Overview of removed sequences length count expect max.err error counts 3 1220 1310.4 0 1220 4 660 327.6 0 660 5 510 81.9 0 510 6 386 20.5 0 386 7 326 5.1 0 326 8 330 1.3 0 330 9 261 0.3 0 261 10 265 0.3 0 265 11 246 0.3 0 246 12 250 0.3 0 250 13 286 0.3 0 286 14 247 0.3 0 247 15 250 0.3 0 250 16 227 0.3 0 227 17 201 0.3 0 201 18 203 0.3 0 203 19 203 0.3 0 203 20 192 0.3 0 192 21 201 0.3 0 201 22 171 0.3 0 171 23 211 0.3 0 211 24 155 0.3 0 155 25 184 0.3 0 184 26 161 0.3 0 161 27 157 0.3 0 157 28 167 0.3 0 167 29 129 0.3 0 129 30 137 0.3 0 137 31 138 0.3 0 138 32 138 0.3 0 138 33 103 0.3 0 103 34 126 0.3 0 126 35 93 0.3 0 93 36 102 0.3 0 102 37 99 0.3 0 99 38 86 0.3 0 86 39 75 0.3 0 75 40 80 0.3 0 80 41 78 0.3 0 78 42 74 0.3 0 74 43 67 0.3 0 67 44 73 0.3 0 73 45 77 0.3 0 77 46 48 0.3 0 48 47 53 0.3 0 53 48 65 0.3 0 65 49 47 0.3 0 47 50 51 0.3 0 51 51 25 0.3 0 25 52 30 0.3 0 30 53 24 0.3 0 24 54 15 0.3 0 15 55 16 0.3 0 16 56 12 0.3 0 12 57 6 0.3 0 6 58 8 0.3 0 8 59 5 0.3 0 5 60 17 0.3 0 17 61 20 0.3 0 20