//inlclude前用define 
#define _USE_MATH_DEFINES

//include
#include<iostream>
#include<string>
#include<algorithm>
#include<vector>
#include<cmath>

using namespace std;
//typedef
typedef vector<int> VI;
typedef vector<string> VS;
typedef vector<char> VC;

int main() {
	int x = 0, y = 0;
	string s;
	cin >> s;
	int size = s.size();
	for (int i = 0; i < size; i++) {
		if (s[i] == 'N') {
			y++;
		}else if (s[i] == 'E') {
			x++;
		}else if (s[i] == 'W') {
			y--;
		}else if (s[i] == 'S') {
			x--;
		}
	}
	if (x < 0) x *= -1;
	if (y < 0) y *= -1;

	cout << sqrt(pow(x, 2) + pow(y, 2)) << endl;
	return 0;
}