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

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