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

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

    int dx = 0, dy = 0;
    for (auto x : s) {
        if (x == 'N') dy++;
        if (x == 'E') dx++;
        if (x == 'W') dx--;
        if (x == 'S') dy--;
    }

    cout << sqrt(dx * dx + dy * dy) << endl;

    return 0;
}