package main

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

func solve(in io.Reader, out, err io.Writer) {
	ns, ew, temp := 0, 0, []byte{}
	fmt.Fscan(in, &temp)

	for i := range temp {
		switch temp[i] {
		case 'N':
			ns++
		case 'S':
			ns--
		case 'E':
			ew++
		case 'W':
			ew--
		}
	}
	fmt.Fprintln(out, math.Sqrt(float64(ns*ns+ew*ew)))

}

func main() {
	br := bufio.NewReaderSize(os.Stdin, int(1e3))
	solve(br, os.Stdout, os.Stderr)
}