#include <iostream>
#include <string>
#include <cmath>
using namespace std;

int main(){
   int length[2] = {};
   string s;
   cin >> s;
   for(char c : s){
      if(c == 'E') length[0]++;
      else if(c == 'W') length[0]--;
      else if(c == 'N') length[1]++;
      else length[1]--;
   }
   cout << sqrt(pow(abs(length[0]),2) + pow(abs(length[1]),2)) << endl;
}