#include <iostream>
#include <sstream>
#include <math.h>
#include <stack>
#include <set>
#include <algorithm>
#include <string>
#include <queue>
#include <stack>
#include <map>
#include <cstdio>
#include <vector>
using namespace std;

#define INF (1 << 30)
#define INFLL (1LL << 60)

int main() {
	string str;
	cin >> str;
	int x = 0,y = 0;
	for(int i = 0;i < str.size();i++){
		if(str[i] == 'N') y--;
		else if(str[i] == 'E') x++;
		else if(str[i] == 'W') x--;
		else y++;
	}
	cout << sqrt(x*x + y*y) << endl;
	return 0;
}