import Control.Applicative ((<$>))

import Data.ByteString.Char8 (ByteString)
import qualified Data.ByteString.Char8 as B
import Data.Bits ((.&.))

main :: IO ()
main = do
  solve <$> getl (readi B.readInt) >>= putStrLn

solve :: Int -> String
solve x = f 1 (x - 1)
  where
    f a b
      | b == 0 = "-1"
      | isp2 a || isp2 b = f (a + 1) (b - 1)
      | otherwise = show a ++ " " ++ show b

isp2 :: Int -> Bool
isp2 x = f 0 x == 1
  where
    f c n | n == 0 = c
          | otherwise = f (c + 1) (n .&. (n - 1))

getl :: (ByteString -> a) -> IO a
getl f = f <$> B.getLine

readi :: Integral a =>  (ByteString -> Maybe (a, ByteString)) -> ByteString -> a
readi f s = let Just (n, _) = f s in n