sqrt' [x, y] = sqrt ((x^2) + (y^2))

news s [x, y] = case s of
    'N' ->
        [x, y + 1]
    'E' ->
        [x - 1, y]
    'W' ->
        [x + 1, y]
    'S' ->
        [x, y - 1]
    _   ->
        [x, y]

main = getLine >>= print . sqrt' . foldr (news) [0.0, 0.0]