Help for this page
c:\@Work\Perl\monks>perl -wMstrict -le "use Data::Dump qw(dd); ... dd \@ra; " [1, 2, 3, 9, 10, 11, 13]
c:\@Work\Perl\monks>perl -wMstrict -le "use Data::Dump qw(dd); ... dd \@ra; " ["0001", "0002", "0003", "011", "012", "013", "015"]