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){
		int[] count_point = {0,0,0,0};//N,E,W,S
		for(int i = 0; i < point.length(); i++){
			String now = point.substring(i,i+1);
			if(now.equals("N")){
				count_point[0]+=1;
			}else if(now.equals("E")){
				count_point[1]+=1;
			}else if(now.equals("W")){
				count_point[2]+=1;
			}else{
				count_point[3]+=1;
			}
		}
		int[] right = {count_point[1],count_point[0]};//x,y
		int[] left = {count_point[2]*(-1),count_point[3]*(-1)};
		double x = Math.pow(right[0]+left[0],2);
		double y = Math.pow(right[1]+left[1],2);
		System.out.println(Math.sqrt(x+y));
	}
}