package main

import (
	"fmt"
	"math"
)

func main() {
	var x, y int
	var s string
	fmt.Scan(&s)
	for i := 0; i < len(s); i++ {
		if s[i] == 'N' {
			y++
		} else if s[i] == 'S' {
			y--
		} else if s[i] == 'E' {
			x++
		} else {
			x--
		}
	}
	// fmt.Println("x", x, "y", y)
	fmt.Println(math.Sqrt(float64(x*x) + float64(y*y)))
}