package main

import (
	"bufio"
	"os"
	"strconv"
	"fmt"
	"math"
)

var s = bufio.NewScanner(os.Stdin)

func next() string {
	s.Split(bufio.ScanWords)
	s.Scan()
	return s.Text()
}

func nextInt() int {
	i, e := strconv.Atoi(next())
	if e != nil {
		panic(e)
	}
	return i
}
func nextLong() int64 {
	i, e := strconv.ParseInt(next(), 10, 64)
	if e != nil {
		panic(e)
	}
	return i
}
func abs(a int) int {
	if a < 0 {
		return -a
	}
	return a
}

func main() {
	S := next()
	x := 0
	y := 0

	for _, c := range S {
		switch c{
		case 'N':
			y++
		case 'E':
			x++
		case 'W':
			x--
		case 'S':
			y--
		}
	}
	fmt.Println(math.Sqrt(float64(abs(x*x+y*y))))
}