#include<iostream>
#include<algorithm>
#include <vector>
#include<cmath>
#include<iomanip>
using namespace std;
typedef long long int lont;
int main() {
	string S;
	cin >> S;
	int Z = S.size();
	int cntx = 0;
	int cnty = 0;
	for (int ia = 0; ia < Z; ia++) {
		if (S.at(ia) == 'N') {
			cnty++;
		}
		else if (S.at(ia) == 'S') {
			cnty--;
		}
		else if (S.at(ia) == 'E') {
			cntx++;
		}
		else if (S.at(ia) == 'W') {
			cntx--;
		}
	}
	cout << sqrt(cntx*cntx+cnty*cnty) << endl;
}