You can answer your own question if you read http://perldoc.perl.org/perlintro.html#Regular-expressions and quotemeta 

my $start = ...;
my $end = ...;
my ( $between ) = $input =~ m/\Q$start\E(.+?)\Q$end\E/;

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In reply to Re: Regex required by Anonymous Monk
in thread Regex required by vaibhav07

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