#include <iostream>
#include <cmath>
#include <string>
using namespace std;
int main() {
    string s;
    int i, n = 0, e = 0;
    cin >> s;
    for (i = 0; i < s.length(); i++) {
        if (s[i] == 'N') {n += 1;}
        if (s[i] == 'E') {e += 1;}
        if (s[i] == 'W') {e -= 1;}
        if (s[i] == 'S') {n -= 1;}
    }
    cout << sqrt(n * n + e * e) << endl;
    return 0;
}