#include <iostream>
#include <string>
#include <cmath>
using namespace std;
int x, y;
string s;

int main() {
  cin >> s;
  for (auto& e : s) {
    if (e == 'N') y++;
    else if (e == 'E') x++;
    else if (e == 'W') x--;
    else if (e == 'S') y--;
  }
  cout << sqrt(x * x + y * y) << endl;
}