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  1. or download this
    #!/usr/bin/perl -w
    use strict;
    ...
      sort { $a->[1] <=> $b->[1] or $a->[2] <=> $b->[2] }
      map { [ $_, unpack('x12a9xa12', $_) ] }
      @original;
    
  2. or download this
    #!/usr/bin/perl -w
    use strict;
    ...
      sort { $a->[0] <=> $b->[0] or $a->[1] <=> $b->[1] }
      map { [ unpack('x12a9xa12', $_) ] }
      @original;