package main

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

func main() {
	sc := NewScanner(os.Stdin)
	line, _ := sc.NextLine()
	var x, y int
	for _, c := range line {
		switch c {
		case 'N':
			y++
		case 'E':
			x++
		case 'W':
			x--
		case 'S':
			y--
		}
	}
	fmt.Printf("%f\n", math.Sqrt(float64(x*x+y*y)))
}

type Scanner struct {
	*bufio.Scanner
}

func NewScanner(r io.Reader) *Scanner {
	return &Scanner{
		bufio.NewScanner(r),
	}
}

func (s *Scanner) NextLine() (string, error) {
	s.Scanner.Split(bufio.ScanLines)
	return s.nextToken()
}

func (s *Scanner) nextToken() (string, error) {
	sc := s.Scanner
	if sc.Scan() {
		return sc.Text(), nil
	}
	if sc.Err() != nil {
		return "", sc.Err()
	}
	return "", io.EOF
}