#include<iostream>
#include<cstdio>
#include<cmath>
#include<string>
using namespace std;

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

	int pos[2] = {};
	for (auto i = s.begin(); i != s.end(); i++)
	{
		switch (*i)
		{
		case 'N':
			pos[0] += 1;
			break;
		case 'E':
			pos[1] += 1;
			break;
		case 'S':
			pos[0] -= 1;
			break;
		case 'W':
			pos[1] -= 1;
		default:
			break;
		}
	}
	cout << hypot(pos[0], pos[1]) << endl;

	return 0;
}