#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;

int main(){
    int h = 0, w = 0;
    string s;
    cin >> s;
    for (int i = 0; i < s.size(); i++){
        if(s[i] == 'N') h++;
        else if (s[i] == 'S') h--;
        else if (s[i] == 'E') w++;
        else w--;
    }
    cout << pow(pow(h, 2) + pow(w, 2), 0.5) << endl;
}