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  my $IFS=$/;  # Save that please... 
  $/='';       # We're gonna make one big input... 
...
  $/=$IFS;          # put that back. 
 
  return 3 if grep /Non-existent/,@check;

  `$nslookup -type=any $domain 2>&1` =~ /Non-existent/ and return 3;