{-# LANGUAGE OverloadedStrings #-}

import Control.Applicative ((<$>))
import qualified Data.ByteString.Char8 as C

main :: IO ()
main = do
    a <- C.sort <$> C.getLine
    b <- C.sort <$> C.getLine
    C.putStrLn $ if a == b then "YES" else "NO"