#include <bits/stdc++.h>
using namespace std;
 
int main(){
  string S;
  vector<double> locate(2,0);
  for(int i=0;i<S.size();i++){
      if(S[i]=='N'){
          locate[1]++;
      }
      else if(S[i]=='S'){
          locate[1]--;
      }
      else if(S[i]=='E'){
          locate[0]++;
      }
      else if(S[i]=='W'){
          locate[0]--;
      }
      
  }
  cout<<sqrt(locate[0]*locate[0]+locate[1]*locate[1])<<endl;
  
}