#include <iostream>
#include <cmath>
using namespace std;
 
int main(){
	string S;
	cin >> S;
	int NS = 0;
	int EW = 0;
	for(int i = 0; i < S.size(); i++){
		if(S[i] == 'N'){
			NS++;
		}else if(S[i] == 'S'){
			NS--;
		}else if(S[i] == 'E'){
			EW++;
		}else{
			EW--;
		}
	}
	cout << sqrt(abs(NS) * abs(NS) + abs(EW) * abs(EW)) << endl;
}