I'm trying to match a string, that logically states: "Unless the string begins with a number that is 5 or more digits long and does not contain any non-digits". I've been using this small test loop:

#!/usr/bin/perl -w 

use strict;

my @stuff = qw(1234 a12345 12345 12345z);

foreach my $num (@stuff) {
    unless ($num =~ /^\d{5,}/) {
        print "Not Valid: $num\n";
    } else {
        print "Valid: $num\n";
    }
}
[download]

As shown here this produces:
Not Valid: 1234
Not Valid: a12345
Valid: 12345
Valid: 12345z

I'm trying to invalidate that last item. I've tried a couple of things, most notably:

/^\d{5,}\D+/ #invalidates all except "12345z"
/^\d{5,}|\D+/ #only "1234" invalid
[download]

I know this shouldn't be difficult, but I've hit a mental roadblock so any help would be appreciated.

-THRAK

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