length: 1 digits: 0 quantity: 3
length: 1 digits: 1 quantity: 2
length: 1 digits: 2 quantity: 2
length: 1 digits: 3 quantity: 4
length: 1 digits: 5 quantity: 2
length: 1 digits: 9 quantity: 3
length: 2 digits: 30 quantity: 2

##</code><code>##

#!/usr/bin/perl -w
use strict;
my $line;
while ( defined ( $line = <> ) ) {
        chomp $line;
        for my $a ( 1 .. length ( $line ) ) {
                for my $b ( 1 .. ( length ( $line ) + 1 - $a ) ) {
                        my $out = substr ( $line, $a - 1, $b );
                        my $count = () = $line =~ /$out/g;
                        print "length: $b digits: $out quantity: $count\n" if $count > 1;
                }
        }
}