import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		int n = s.length();
		int x = 0, y = 0;
		for(int i = 0 ; i < n ; i++) {
			if(s.charAt(i) == 'N') {
				y++;
			} else if(s.charAt(i) == 'S') {
				y--;
			} else if(s.charAt(i) == 'E') {
				x++;
			} else {
				x--;
			}
		}
		System.out.printf("%.5f\n", Math.pow(Math.abs(x * x + y * y), 0.5));
 	}
}