import java.io.*;
import java.util.*;

class Main113 {
	
	public static void out (Object o) {
		System.out.println(o);
	}
		
	public static void main (String[] args) throws IOException {
		BufferedReader br = 
			new BufferedReader(new InputStreamReader(System.in));
		
		String s = br.readLine();
		int x = 0 , y = 0;
		for (int i = 0; i < s.length(); i++) {
			char c = s.charAt(i);
			if (c == 'N')
				y--;
			else if (c == 'E')
				x++;
			else if (c == 'W')
				x--;
			else
				y++;
		}
		
		x = Math.abs(x);
		y = Math.abs(y);
		
		out(Math.sqrt(x * x + y * y));
	}
}