#include <bits/stdc++.h>
using namespace std;

int main() {
  string S;
  cin >> S;
  int x = 0, y = 0;
  for (int i = 0; i < S.size(); i++) {
    if (S.at(i) == 'N') y++;
    if (S.at(i) == 'E') x++;
    if (S.at(i) == 'W') x--;
    if (S.at(i) == 'S') y--;
  }

  cout << sqrt(x * x + y * y) << "\n";
}