#include <algorithm>
#include <iostream>
#include <iomanip>
#include <map>
#include <numeric>
#include <set>
#include <sstream>
#include <string>
#include <vector>
#include <cmath>
using namespace std;

#define FOR(i,s,e) for (int i = int(s); i != int(e); i++)
#define FORIT(i,c) for (typeof((c).begin()) i = (c).begin(); i != (c).end(); i++)
#define ISEQ(c) (c).begin(), (c).end()

int main(){
	string s;
	cin >> s;
	int x = 0;
	int y = 0;

	FOR(i,0,s.length()){
		if(s[i] == 'N') y++;
		else if(s[i]== 'S') y--;
		else if(s[i]=='E') x++;
		else x--;
	}
	double res = sqrt(x*x +  y*y);
	cout << res  << endl;
	return  0;
}