#include <bits/stdc++.h>
#define fastIO (cin.tie(0), cout.tie(0), ios::sync_with_stdio(false))
#define precise(i) fixed << setprecision(i)
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using namespace std;

int main() {
  fastIO;
  int x = 0, y = 0;

  string s;
  cin >> s;

  for (const auto ch : s) {
    if (ch == 'N') {
      y++;
    } else if (ch == 'S') {
      y--;
    } else if (ch == 'W') {
      x++;
    } else if (ch == 'E') {
      x--;
    }
  }

  cout << precise(5) << sqrt(x * x + y * y) << '\n';
}