import java.util.*;
public class searchBox{
	public static void main(String... args){
		Scanner scan = new Scanner(System.in);
		String point = scan.next();
		DoSearch(point);
	}
	public static void DoSearch(String point){
		double x=0,y=0;
		for(int i = 0; i < point.length(); i++){
			String now = point.substring(i,i+1);
			if(now.equals("N")){
				y++;
			}else if(now.equals("E")){
				x++;
			}else if(now.equals("W")){
				x--;
			}else{
				y--;
			}
		}
		System.out.println(Math.sqrt(x*x+y*y));
	}
}