import System.Exit (ExitCode(..), exitSuccess, exitWith)
import System.IO (stderr, hPutStrLn)
import System.Exit (ExitCode(..), exitSuccess, exitWith)
import System.IO (stderr, hPutStrLn)
import DNS (Domain, lookup_ptrs)
import ExitCodes ( exit_args_parse_failed, exit_invalid_cidr )
import Octet ()
import DNS (Domain, lookup_ptrs)
import ExitCodes ( exit_args_parse_failed, exit_invalid_cidr )
import Octet ()