#include<stdio.h>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <sstream>
#include <iostream>
#include <string>
#include <stdio.h>

using namespace std;

int main() {

	string S;
	cin >> S;

	double  x=0.0, y=0.0;
	for (int i = 0; i < S.size(); i++) {
		if (S[i] == 'N') {
			y++;
		}
		if(S[i] == 'S') {
			y--;
		}
		if (S[i] == 'W') {
			x--;
		}
		if (S[i] == 'E') {
			x++;
		}
	}

	double ans = sqrt(x*x + y*y);

	cout << ans << endl;

	return 0;
}