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  1. or download this
    #!/usr/bin/perl -w
    my $all=get_response('a','b');
    ...
      print 'a'.$cgi."\n";  
      print 'b'.$CMD."\n";  
    }
    
  2. or download this
    aa
    Use of uninitialized value $CMD in concatenation (.) or string at x118
    +2315.pl line 6.
    b
    
  3. or download this
    sub get_response {
      local %ENV=%ENV; 
    ...
      close(CGI) or die "Error running $cgi, $!";
      return $res;
    }