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  1. or download this
    #!/usr/bin/perl
    use warnings;
    use strict;
    ...
    "abc" =~ /(.)/;
    call_me();
    say $1;  # Still "a".
    
  2. or download this
    ($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
    }map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,