#include<iostream>
#include<cmath>
#include<string>
using namespace std;
int main(void)
{
	string s; cin >> s;
	int x = 0, y = 0;
	for (char c : s){
		switch (c)
		{
		case 'N': y++; break;
		case 'E': x++; break;
		case 'W': x--; break;
		case 'S': y--; break;
		}
	}
	cout << hypot(x, y) << endl;
	return 0;
}