#include <iostream>
#include <string>
#include <cmath>

using namespace std;
#define REP(i,n) for (int i=0;i<(n);i++)

int main()
{
	int x = 0, y = 0;
	string str;
	cin >> str;

	REP(i, str.size()) {
		switch (str[i])
		{
		case 'E': x++; break;
		case 'W': x--; break;
		case 'N': y++; break;
		default: y--; break;
		}
	}
	cout << sqrt(x * x + y * y) << endl;

	return 0;
}