$accts = accts_file.txt;

$dirtoget = "/my/data/dir/with/files";
opendir(FILEDIR, $dirtoget) || die("Cannot open directory");
@thefiles = grep -T, <$sample_dirtoget/*>;
closedir(FILEDIR);

my %layout = (file1 => 0, file2 => 0, file3 => 0, file4 => 0, file5 => 0, file6 => 0, file6 => 0, file8 => 20,
              file9 ->10, file10 => 11);

foreach $file (@thefiles)  {
$sample_filename =  substr($file, 57);

open(FILE, $file) || die ("Cannot open $file:$!");
while ($line = <FILE>){
chomp $line;
$acct = substr($line, $layout{$file}, 9);
`grep $acct $accts_file.txt >> NEW_$sample_filename`;
}
close(FILE);
}