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

int main()
{
	string S;
	cin >> S;

	int x = 0;
	int y = 0;

	for (char c : S)
	{
		int i = 0;
		for (char news : "NESW")
		{
			if (c == news)
			{
				int sgn = i < 2 ? 1 : -1;
				x += sgn * (i % 2);
				y += sgn * ((i + 1) % 2);
			}
			i++;
		}
	}
	cout << sqrt(x * x + y * y) << endl;
}