#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
    string route;
    
    cin >> route;
    
    int n = 0;
    int s = 0;
    int e = 0;
    int w = 0;
    for (int i = 0; i < route.length(); i++) {
        if (route[i] == 'N') {
            n++;
        } else if (route[i] == 'E') {
            e++;
        } else if (route[i] == 'W') {
            w++;
        } else {
            s++;
        }
    }
    
    int x = abs(e - w);
    int y = abs(n - s);
    
    double ans = sqrt(x*x + y*y);
    
    cout << ans << endl;
    
    return 0;
}