import kotlin.math.*

fun main()
{
    val S = readLine()!!
    var x = 0
    var y = 0
    for (c in S) {
        when (c) {
            'N' -> y++
            'E' -> x++
            'W' -> x--
            'S' -> y--
            else -> {}
        }
    }
    var ans  = sqrt((x * x + y * y).toDouble())

    println("${ans}")
}