#!/usr/bin/perl

my $fil_count = 0;
my $delim = 'test';
open IN, '< test1.txt' or die "Can't open in.txt: $!\n";
open OUT, '> Out0.txt' or die "Can't write to out0.txt: $!\n";
while (<IN>)
{
 if (/^(.*?)$delim(.*)$/)

  {
    print OUT $1 if $1;
    close OUT;
        $fil_count++;
    open OUT, '> Out' . $fil_count . '.txt' or die "Can't write to out
+${fil_count}.txt: $!\n";
    print OUT $2 if $2;
  }
  else {
    print OUT $_;
  }
}
close IN;