Abigail-II's solution filters out all lines that end in a single-digit, which is exactly++ what you asked for here. But, if you are also trying to filter out strings with 'non-word' characters in the final chunk as you sought in this thread, remember that '\w' matches only alphanumeric plus '_'. It will not match '-' so, if you are still trying to perform both filters, you will continue to skip line 2 of your example.

Combining the two requirements, adding '-' to the 'words' character set, does this do what you want?

#!/usr/bin/perl -w
use strict;
foreach my $lastone (<DATA>){
    if ($lastone =~ m{/[-\w]+$} && $lastone !~ m{/\d$}){
        print $lastone;
    }
}

__END__
hull/uuu/8
cook/too/un-8-9
luck/goo@@
luck/goo
yty~uyuoo~iu99~##uyt~hu/dwo9
chuck/ii@@/a_
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