#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<map>
#include<math.h>
#define all(x) x.begin(),x.end()
#define pb push_back
#define ll long long 
#define P pair<double,double>
#define LP pair<ll,ll>
using namespace std;
int main() {
	string s;
	cin >>s;
	double ans;
	P a={0,0};
	for (int i = 0; i < s.size(); i++) {
		if (s[i] == 'E') a.first++;
		else if (s[i] == 'W') a.first--;
		else if (s[i] == 'N') a.second++;
		else a.second--;
	}
	ans = sqrt(pow(a.first, 2) + pow(a.second, 2));
	cout << ans << endl;
	
	
	return 0;
}