import Control.Applicative ((<$>))
import Data.ByteString.Char8 (ByteString)
import qualified Data.ByteString.Char8 as B
import Text.Printf

main :: IO ()
main = printf "%.5f" =<< solve <$> B.getLine

solve :: ByteString -> Double
solve bs = sqrt (s * s + t * t)
    where
        (x, y) = B.foldl' f (0, 0) bs
        (s, t) = (fromIntegral x, fromIntegral y)

f :: (Int, Int) -> Char -> (Int, Int)
f (x, y) c
    | c == 'N'  = (x, y + 1)
    | c == 'E'  = (x + 1, y)
    | c == 'W'  = (x - 1, y)
    | c == 'S'  = (x, y - 1)
    | otherwise = (x, y)