#include <cmath>
#include <iostream>
#include <map>

using namespace std;

int main(int argc, const char* argv[])
{
	string S;
	cin >> S;
	map<char, int> m;
	for (auto&& c : S) m[c]++;
	int x = m['E'] - m['W'];
	int y = m['N'] - m['S'];
	cout << sqrt(x * x + y * y) << endl;
	return 0;
}