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