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>hsa_circ_0000001|chr1:1080738-1080845-|None|None ATGGGGTTGGGTCAGCCGTGCGGTCAGGTCAGGTCGGCCATGAGGTCAGGTGGGGTCGGCCATGAAGGTG +GTGGGGGTCATGAGGTCACAAGGGGGTCGGCCATGTG >hsa_circ_0000002|chr1:1158623-1159348-|NM_016176|SDF4 GGTGGATGTGAACACTGACCGGAAGATCAGTGCCAAGGAGATGCAGCGCTGGATCATGGAGAAGACGGCC +GAGCACTTCCAGGAGGCCATGGAGGAGAGCAAGACACACTTCCGCGCCGTGGACCCTGACGGGGACGGT +CACGTGTCTTGGGACGAGTATAAGGTGAAGTTTTTGGCGAGTAAAGGCCATAGCGAGAAGGAGGTTGCC +GACGCCATCAGGCTCAACGAGGAACTCAAAGTGGATGAGGAAA
my $filename = 'counts.txt'; open (my $fh, '>', $filename) or die "Could not open '$filename' $!"; ... print $fh $count; close $fh;