import java.util.Scanner;

public class Main {
	public static void main(String[] a) {
		Scanner s = new Scanner(System.in);
		int x=0,y=0;
		for(char c:s.nextLine().toCharArray()){
			x+=c=='W'?-1:c=='E'?1:0;
			y+=c=='N'?-1:c=='S'?1:0;
		}
		System.out.println(Math.sqrt(x*x+y*y));
	}
}