#include <iostream>
#include <cmath>
//using namespace std;
typedef unsigned long long ul;
typedef signed long long ll;

int main(void)
{
  std::cin.tie(0);
  std::ios::sync_with_stdio(false);
  std::cout << std::fixed;
  std::string s;
  std::cin >> s;
  int x = 0, y = 0;
  for (auto c : s) {
    if (c=='N') y++;
    if (c=='S') y--;
    if (c=='E') x++;
    if (c=='W') x--;
  }
  std::cout << sqrt(x*x + y*y) << std::endl;
  return 0;
}