dir-100-1  dir-100-10  dir-100-2  dir-100-9  dir-100-99  dir-2-1  dir-28-1  dir-29-1  dir-29-2  dir-30-1  dir-3-1
##</code><code>##

dir-100-99
dir-100-10
dir-100-9
dir-100-2
dir-100-1
dir-30-1
dir-29-2
dir-29-1
dir-28-1
dir-3-1
dir-2-1

##</code><code>##

ls -d ./dir-* | xargs perl -e'print ((sort {$b->[0] <=> $a->[0] || $b->[1] <=> $a->[1] } map { m|/dir-(\d+)-(\d+)|; [$1,$2,$_] } @ARGV)[1]->[2])'