#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <iostream>
#include <map>
#include <list>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <queue>
#include <iomanip>

using namespace std;

int main(void)
{
	string s;
	int tate = 0;
	int yoko = 0;
	double res;

	cin >> s;

	for (int i = 0; i < s.length(); i++) {
		switch (s[i])
		{
		case('N'):
			tate++;
			break;
		case('E'):
			yoko++;
			break;
		case('W'):
			yoko--;
			break;
		case('S'):
			tate--;
			break;
		default:
			break;
		}
	}

	res = (double)sqrt(pow(yoko, 2) + pow(tate, 2));


	cout << res << endl;

	return (0);
}