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

int main() {
    string s; cin >> s;
    int y, x;
    y=x=0;
    for (char c : s) {
        if (c == 'N') y++;
        else if (c == 'E') x++;
        else if (c == 'W') x--;
        else y--;
    }
    cout << sqrt(y*y+x*x) << endl;
    return 0;
}