#include "bits/stdc++.h"
using namespace std;

int main() {
	string S;
	int NS = 0, EW = 0;
	cin >> S;
	for (int i = 0; i < S.size(); i++) {
		if (S[i] == 'N') NS++;
		if (S[i] == 'S') NS--;
		if (S[i] == 'E') EW++;
		if (S[i] == 'W') EW--;
	}
	double x = NS * NS + EW * EW;
	cout << sqrt(x) << endl;
}