>hsa_circ_0075116|chr5:175956288-175956388-|NM_014901|RNF44  FORWARD
-4.6      12 ..      35   xxxxGTGTGTGGTCT          GC TTCAGTGACTTCGAGGCGCG GC           AGCTGCTCCGAGTCC
-5.5      11 ..      36   xxxxxGTGTGTGGTC         TGC TTCAGTGACTTCGAGGCGCG GCA          GCTGCTCCGAGTCCT
-7.8      10 ..      37   xxxxxxGTGTGTGGT        CTGC TTCAGTGACTTCGAGGCGCG GCAG         CTGCTCCGAGTCCTC
-4.3       9 ..      38   xxxxxxxGTGTGTGG       TCTGC TTCAGTGACTTCGAGGCGCG GCAGC        TGCTCCGAGTCCTCC
-4.6      31 ..      41   CAGTGACTTCGAGGC                 GCGG CAG CTGC                 TCCGAGTCCTCCCCT
-5.7      28 ..      44   CTTCAGTGACTTCGA              GGCGCGG CAG CTGCTCC              GAGTCCTCCCCTGCA
-5.1      20 ..      49   GTGGTCTGCTTCAGT       GACTT CGAGGCGCGGCAGCTGCTCC GAGTC        CTCCCCTGCAACCAT
-4.3      27 ..      56   GCTTCAGTGACTTCG       AGGCG CGGCAGCTGCTCCGAGTCCT CCCCT        GCAACCATGAGTTCC
-5.6      31 ..      58   CAGTGACTTCGAGGC        GCGG CAGCTGCTCCGAGTCCTCCC CTGC         AACCATGAGTTCCAC
-5.4      72 ..      82   GCAACCATGAGTTCC                 ACAC CAA GTGT                 GTTGACAAGTGGTTG
-7.7      71 ..      83   TGCAACCATGAGTTC                CACAC CAA GTGTG                TTGACAAGTGGTTGA
-4.2      70 ..      84   CTGCAACCATGAGTT               CCACAC CAA GTGTGT               TGACAAGTGGTTGAA
>hsa_circ_0014931|chr1:160293220-160293320-|NM_001098398|COPA  FORWARD
-5.5      11 ..      36   xxxxxGGTCACGATC         GTG GAGTAAACTGGGCTGCCTTC CAC          CCCACTATGCCCCTT
-4.5      22 ..      40   GATCGTGGAGTAAAC             TGGGCTG CCTTC CACCCCA             CTATGCCCCTTATTG
-4.1      11 ..      41   xxxxxGGTCACGATC      GTGGAG TAAACTGGGCTGCCTTCCAC C-CCAC       TATGCCCCTTATTGT

##</code><code>##

-4.6      <b>12 ..      35</b>   xxxxGTGTGTGGTCT          GC TTCAGTGACTTCGAGGCGCG GC           AGCTGCTCCGAGTCC
-5.5      <b>11 ..      36</b>   xxxxxGTGTGTGGTC         TGC TTCAGTGACTTCGAGGCGCG GCA          GCTGCTCCGAGTCCT
-7.8      <b>10 ..      37</b>   xxxxxxGTGTGTGGT        CTGC TTCAGTGACTTCGAGGCGCG GCAG         CTGCTCCGAGTCCTC
-4.3       <b>9 ..      38</b>   xxxxxxxGTGTGTGG       TCTGC TTCAGTGACTTCGAGGCGCG GCAGC        TGCTCCGAGTCCTCC
-4.6      31 ..      41   CAGTGACTTCGAGGC                 GCGG CAG CTGC                 TCCGAGTCCTCCCCT

##</code><code>##

#!/usr/bin/perl 
use strict;
use warnings;

open my $hairpin_file, '<', "test.hairpin", or die $!;

my %HoA_sequences;

while (my $line = <$hairpin_file>){
	if ($line =~ /^>hsa/){
		$HoA_sequences{$line} = 
## Do I provide the key for the hash as soon as I read in the line bearing the sequence name?
## And can I create a hash with a key but no hash? I'm guessing not. :/
	}

}

##</code><code>##



if ($line =~ /$RE{num}{real}\s+($RE{num}{real})\s..+($RE{num}{real})+/){
	my $start = $1 && my $end = $2;
## Once captured how do I continue to the next line to query if the 
## value is - or + of the start and end values
}