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  1. or download this
    use strict;
    use warnings;
    ...
    __END__
    0 1 1 1 0 1 0 0 0
    0 1 1 1 0 1 0 0 0
    
  2. or download this
    package QKey;
    use strict;
    ...
    }
    
    1;
    
  3. or download this
    package QStuff;
    use strict;
    ...
    }
    
    1;
    
  4. or download this
    use strict;
    use warnings;
    ...
    print "@{[$a1->args]}\n";
    print "@{[$b0->args]}\n";
    print "@{[$b1->args]}\n";