#include <iostream>

#include <math.h>
using namespace std;

int main(){


  string s;
  cin >> s;
  int a,ns,ew;
  ns = 0;
  ew = 0;
  a = s.size();
  for (int i = 0; i < a; i++) {
    if (s[i] == 'N') {
      ns++;
    }else if (s[i] == 'E') {
      ew++;
    }else if (s[i] == 'S') {
      ns--;
    }else if (s[i] == 'W') {
      ew--;
    }
  }

  float result = sqrt(ns * ns + ew * ew);
  cout << result << "\n";
  return 0;
}