import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class No113 {

	public static void main(String[] args) {
		try{
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			String str = br.readLine();
			String[] houi = new String[str.length()];
			for(int i=0; i<str.length(); i++)
				houi[i] = String.valueOf(str.charAt(i));
			int x = 0; int y = 0;
			for(int i=0; i<houi.length ;i++){
				if(houi[i].equals("N"))
					y++;
				if(houi[i].equals("S"))
					y--;
				if(houi[i].equals("E"))
					x++;
				if(houi[i].equals("W"))
					x--;
			}
			System.out.println(Math.sqrt(Math.pow(x,2)+Math.pow(y,2)));
		}catch(IOException e){
			e.getStackTrace();
		}
	}
}