#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>
#include <bitset>
#include <cassert>

using namespace std;


int main() {

    int X = 0;
    int Y = 0;

    string S;
    cin >> S;

    for (int i = 0; i < S.size(); ++i) {
        switch (S[i]) {
            case 'N':
                Y += 1;
                break;
            case 'E':
                X += 1;
                break;
            case 'W':
                X -= 1;
                break;
            case 'S':
                Y -= 1;
                break;
        }
    }



    cout << fixed << setprecision(3)<< sqrt((double)(X*X)+(double)(Y*Y)) << endl;

    return 0;
}