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  1. or download this
    # p_1.pl
    
    ...
    print "in $0: exiting \n";
    
    exit;
    
  2. or download this
    >perl p_1.pl
    in p_2.pl: HI THERE
    in p_2.pl: BYE NOW
    in p_2.pl: exiting
    p_1.pl exiting