#include <iostream>
#include <cmath>

using namespace std;

int main(){
  string s;
  cin >> s;

  int x=0, y=0;
  for (auto &c:s) {
    if (c=='N') y++;
    else if (c=='S') y--;
    else if (c=='E') x++;
    else if (c=='W') x--;
  }

  cout << sqrt(pow(abs(x), 2)+pow(abs(y), 2)) << endl;
  return 0;
}