#include<iostream>
#include<math.h>
#include<string>
using namespace std;

int main(){
	string h;
	cin >> h;
	int x = 0;
	int y = 0;
	int next = 0;
	double ans;
	while (1){
		int loc = h.find("N", next);
		if (loc == string::npos){
			break;
		}
		else{
			next = loc+1;
		}
		y += 1;	

	}
	next = 0;
	while (1){
		int loc = h.find("E", next);
		if (loc == string::npos){
			break;
		}
		else{
			next = loc + 1;
		}
		x += 1;

	}
	next = 0;
	while (1){
		int loc = h.find("W", next);
		if (loc == string::npos){
			break;
		}
		else{
			next = loc + 1;
		}
		x -= 1;

	}
	next = 0;
	while (1){
		int loc = h.find("S", next);
		if (loc == string::npos){
			break;
		}
		else{
			next = loc + 1;
		}
		y -= 1;

	}
	ans = sqrt(x*x + y*y);
	cout << ans << endl;
	return 0;
}