open(FH, "/path/to/file") || die "Can't open file: $!";
my @file = <FH>;
close FH;


##</code><code>##

open(FH, "/path/to/file") || die "Can't open file: $!";
foreach my $file (<FH>){
     if($file eq $external_info){
          print "great\!";
          last;
     }
}
close FH;


##</code><code>##

---
print map { my ($m)=1<<hex($_)&11?' ':'';
$m.=substr('AHJPacehklnorstu',hex($_),1) }
split //,'2fde0abe76c36c914586c';