This is cutadapt 2.8 with Python 3.7.4 Command line parameters: -a C{9} -m 20 -o TP2.trim.fastq TP2.fastq Processing reads on 1 core in single-end mode ... Finished in 1.15 s (24 us/read; 2.51 M reads/minute). === Summary === Total reads processed: 48,199 Reads with adapters: 5,263 (10.9%) Reads that were too short: 309 (0.6%) Reads written (passing filters): 47,890 (99.4%) Total basepairs processed: 2,940,139 bp Total written (filtered): 2,849,353 bp (96.9%) === Adapter 1 === Sequence: CCCCCCCCC; Type: regular 3'; Length: 9; Trimmed: 5263 times; Reverse-complemented: 0 times No. of allowed errors: 0-9 bp: 0 Bases preceding removed adapters: A: 49.6% C: 0.0% G: 17.1% T: 33.3% none/other: 0.0% Overview of removed sequences length count expect max.err error counts 3 703 753.1 0 703 4 441 188.3 0 441 5 305 47.1 0 305 6 245 11.8 0 245 7 204 2.9 0 204 8 174 0.7 0 174 9 139 0.2 0 139 10 112 0.2 0 112 11 115 0.2 0 115 12 121 0.2 0 121 13 162 0.2 0 162 14 135 0.2 0 135 15 106 0.2 0 106 16 104 0.2 0 104 17 133 0.2 0 133 18 99 0.2 0 99 19 107 0.2 0 107 20 119 0.2 0 119 21 102 0.2 0 102 22 107 0.2 0 107 23 95 0.2 0 95 24 87 0.2 0 87 25 95 0.2 0 95 26 85 0.2 0 85 27 95 0.2 0 95 28 70 0.2 0 70 29 75 0.2 0 75 30 68 0.2 0 68 31 69 0.2 0 69 32 76 0.2 0 76 33 64 0.2 0 64 34 60 0.2 0 60 35 53 0.2 0 53 36 42 0.2 0 42 37 42 0.2 0 42 38 35 0.2 0 35 39 46 0.2 0 46 40 31 0.2 0 31 41 33 0.2 0 33 42 32 0.2 0 32 43 34 0.2 0 34 44 27 0.2 0 27 45 25 0.2 0 25 46 32 0.2 0 32 47 33 0.2 0 33 48 30 0.2 0 30 49 20 0.2 0 20 50 19 0.2 0 19 51 8 0.2 0 8 52 11 0.2 0 11 53 9 0.2 0 9 54 5 0.2 0 5 55 8 0.2 0 8 56 6 0.2 0 6 57 4 0.2 0 4 58 1 0.2 0 1 59 2 0.2 0 2 60 2 0.2 0 2 61 1 0.2 0 1