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  1. or download this
    #!/bin/sh
    wrapper real_script "$@"
    
  2. or download this
    #!/bin/sh
    perl "$@"
    
  3. or download this
    #!perl -w
    4;
    print("Hello, World\n");
    
  4. or download this
    $ script
    Useless use of a constant (4) in void context at real_script line 2.
    Hello, World