import java.io.BufferedInputStream;
import java.io.IOException;
import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.*;
import java.util.Map.Entry;

public class Main {
	public static final int C =  1000000007;
	//static int map[][];
	static int N;
	//static int M;
	//static int tic[][];
	//static int dp[][];
	//static int max;
	static int B[];
	//static int p[];
	//static ArrayList<HashSet<Integer>> al;
	static ArrayList<Integer> al;
	//static int a[][];
	//static char[][] ch;
	//static ArrayList<HashMap<Long, Long>> al;
	//static String a[];
	//static String str;
	//static int[] mach = new int[] {6, 2, 5, 5, 4, 5, 6, 3, 7, 6};

	public static void main(String[] args) {
		//StringBuilder sb = new StringBuilder();
		BufferedInputStream bs = new BufferedInputStream(System.in);
		Scanner sc = new Scanner(bs);
		//String str = sc.next();



		String str = sc.next();

		
		
		double ans = 0;
		double w = 0;
		double h = 0;
		for (int i=0; i < str.length(); i++) {
			switch(str.charAt(i)) {
			case 'N':
				h++;
				break;
			case 'S':
				h--;
				break;
			case 'E':
				w++;
				break;
			case 'W':
				w--;
				break;
			}
		}
		ans = Math.hypot(h, w);
		
	
			
		System.out.println(ans);

		/*if (ans) {
			System.out.println("YES");
		}else{
			System.out.println("NO");
		}*/

	}




}