First I changed the default line delimiter to 'END'. Then I went through each record and did a multi-line regex to match what is between START and END.
#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
# change line delimter
$/ = "END";
while (<DATA>) {
my $line = $_;
# match REGEX across multiple lines
$line =~ /START(.*)END/s;
# get the match
my $contents = $1;
print Dumper $contents if defined $contents;;
}
__DATA__
XXXX
YYYY
START
These are the first
set of lines
which are to be extracted
END
XXX
ZZZ
YYY
START
These are the second
set of lines
which are to be extracted
END
aasds
tteret
tertetr
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