import java.math.*;
import java.util.*;

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