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

int main() {
	string s;
	cin >> s;

	int x = 0,
		y = 0;
	for (int i = 0; i < s.size(); i++) {
		char c = s.at(i);
		if (c == 'N') y++;
		if (c == 'E') x++;
		if (c == 'W') x--;
		if (c == 'S') y--;
	}

	x *= x;
	y *= y;
	int sum = x + y;
	double a = sqrt(sum);

	cout << a << endl;
}