#!/usr/bin/perl -w
#use strict;

my $startstring='Chapter\s2\.\sMain';
my $endstring='Chapter\s3\.\sConclusion';

{
local $/;
open (SLURP, "C:\\Text\\1.txt") or die $!; 
$data = <SLURP>; 


close SLURP or die $!;

{
@finds=$data=~m/($startstring.*?$endstring)/ismo;
}

open my $OUTFILE, ">", "C:\\Text\\Chapter2\\1.txt" or die $!;
print $OUTFILE "@finds";
close $OUTFILE;
}