//Normal

#define _GLIBCXX_DEBUG
#define ll long long
#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

void print(auto a){
  cout << a;
}

void prints(auto a){
  cout << a << " ";
}

void prints(){
  cout << " ";
}

void printl(auto a){
  cout << a << endl;
}

void printl(){
  cout << endl;
}

void fix(int n){
  cout << fixed << setprecision(n);
}

int main(){
  string S; cin >> S;
  int siz = (int)S.size();
  
  int h = 0, w = 0;
  for(int i = 0; i < siz; i++){
    if(S[i] == 'N') h++;
    if(S[i] == 'E') w++;
    if(S[i] == 'W') w--;
    if(S[i] == 'S') h--;
  }
  
  double ans = sqrt(h*h + w*w);
  
  fix(10);
  printl(ans);
  
  return 0;
}