#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)
#define FOR(i, m, n) for(int i = m;i < n;i++)

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main() {
	string input;
	cin >> input;
	int a,b = 0;
	REP(i,input.size()){
		if(input[i] == 'N') a += 1;
		if(input[i] == 'E') b += 1;
		if(input[i] == 'W') b -= 1;
		if(input[i] == 'S') a -= 1;
		}
	double ans = sqrt(a*a + b*b);
	cout << ans << endl;;

	return 0;
}