#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <stdio.h>
#include <cstring>
#include <queue>
#include <stack>
#include <functional>
#include <math.h>
#include <iomanip>
using namespace std;
#define Would
#define you
const int INF = 999999999;
const int MOD = 1e9 + 7;
const double pi = 3.141592653589793238;

int x, y;
int main() {
	string h;
	cin >> h;
	for (char s : h) {
		switch (s) {
		case 'N':
			++y;
			break;
		case 'E':
			++x;
			break;
		case 'W':
			--x;
			break;
		case 'S':
			--y;
			break;
		}
	}
	cout << setprecision(20) << sqrt(x*x + y * y) << endl;
}