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

int main(){
  string a;
  cin >> a;
  int count1=0;
  int count2=0;
  for(int i=0;i<a.size();i++){
    if(a.at(i)=='N')count1++;
    else if(a.at(i)=='S')count1--;
    else if(a.at(i)=='E')count2++;
    else if(a.at(i)=='W')count2--;
  }
  cout << sqrt(pow(count1, 2)+pow(count2, 2));
}