import java.util.*;

public class Main {
    private static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        int x = 0;
        int y = 0;
        String s = sc.next();
        for (int i = 0;i < s.length();i++) {
            if (s.charAt(i) == 'N') y++;
            if (s.charAt(i) == 'E') x++;
            if (s.charAt(i) == 'W') x--;
            if (s.charAt(i) == 'S') y--;
        }
        
        System.out.println(Math.sqrt(Math.pow(x,2)+Math.pow(y,2)));
    }
}