import scala.math._

object Main {
  def main(args: Array[String]) {
    val sc = new java.util.Scanner(System.in)
    val s = sc.nextLine
    var x, y = 0
    for (c <- s) c match {
      case 'N' => y += 1
      case 'E' => x += 1
      case 'W' => x -= 1
      case 'S' => y -= 1
    }
    println(sqrt(x*x + y*y))
  }
}