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

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

    int x = 0, y = 0;
    for (auto& c : S) {
        x += (c == 'E');
        x -= (c == 'W');
        y += (c == 'N');
        y -= (c == 'S');
    }

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