import java.util.Scanner;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;

class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();

        int x = 0, y = 0;
        for(int i=0; i<s.length(); i++) {
            switch(s.charAt(i)) {
            case 'N':
                y++;
                break;
            case 'W':
                x--;
                break;
            case 'S':
                y--;
                break;
            case 'E':
                x++;
                break;
            default:
                break;
            }
        }

        double l = Math.sqrt(x*x + y*y);

        System.out.println(l);

        in.close();
    }
}