package main

import (
	"fmt"
	"math"
)

func main() {
	var s string
	var x, y int
	fmt.Scan(&s)
	for _, v := range s {
		switch v {
		case 'N':
			y++
		case 'S':
			y--
		case 'E':
			x++
		case 'W':
			x--
		}
	}
	fmt.Println(math.Sqrt(float64(x*x + y*y)))
}