import java.util.Scanner;
	

public class Main{
	
	
	public static void main(String args[])throws Exception{
		Scanner sc = new Scanner(System.in);
		String S = sc.next();
		int x = 0;
		int y = 0;
		int L = S.length();
		for(int i=0;i<L;i++){
			char c = S.charAt(i);
			
			switch(c){
			
			case 'N':
				y++;
				break;
			case 'E':
				x++;
				break;
			case 'W':
				x--;
				break;
			case 'S':
				y--;
				break;
			}
		}
		
		System.out.println(Math.pow((double)(x*x+y*y), 0.5));
	}
	

}