#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define sz(n) (int)(n).size()
using namespace std;
typedef long long ll;

int main() {
	string s;
	cin >> s;
	double ns = 0, ew = 0;
	FOR(i, 0, sz(s)) {
		if (s[i] == 'N') ns++;
		else if(s[i] == 'S') ns--;
		else if (s[i] == 'E') ew++;
		else ew--;
	}
	cout << sqrt(pow(abs(ns), 2) + pow(abs(ew), 2)) << endl;
	return 0;
}