import java.util.*;

class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		
		String s = sc.next();
		int x = 0; int y = 0;
		for (int i=0; i<s.length(); i++) {
			if (s.charAt(i) == 'N') y++;
			else if (s.charAt(i) == 'E') x++;
			else if (s.charAt(i) == 'W') x--;
			else y--;
		}
		System.out.println(calcEuclidDistance(0,0,x,y));
		
		
	}
	
	static int calcManhatDistance (int x1, int y1, int x2, int y2) {
		int d = Math.abs(x1-x2)+Math.abs(y1-y2);
		return d;
	}
	static double calcEuclidDistance (double x1, double y1, double x2, double y2) {
		double d = Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
		return d;
	}
	
}