#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const double EPS = 1e-9;
typedef vector<int> vint;
typedef pair<int, int> pint;
#define rep(i, n) REP(i, 0, n)
#define ALL(v) v.begin() , v.end()
#define REP(i, x, n) for(int i = x; i < n; i++)


int main(){
    string s; cin >> s;
    int x = 0,y = 0;
    if(s.size() > 1){
        rep(i, s.size()){
            if(s[i] == 'E') x++;
            if(s[i] == 'W') x--;
            if(s[i] == 'N') y++;
            if(s[i] == 'S') y--;
        }
        cout << sqrt(pow(abs(x),2) + pow(abs(y), 2)) << endl;
    } else {
        cout << '1' << endl;
    }
}