#include "bits/stdc++.h"
using namespace std;
using Graph = vector<vector<int>>;
typedef long long ll;
typedef pair<ll, ll> P;
#define rep(i,n) for (ll i = 0; i < (n); ++i)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const long long mod = 1e9 + 7;

ll gcd(ll a, ll b) {
	return b ? gcd(b, a % b) : a;
}

ll lcm(ll a, ll b) {
	return a / gcd(a, b) * b;
}

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

	ll x=0;
	ll y=0;
	
	rep(i, s.size()) {
		if (s[i] == 'N') {
			x++;
		} else if (s[i] == 'E') {
			y++;
		} else if (s[i] == 'W') {
			y--;
		} else if (s[i] == 'S') {
			x--;
		}
	}

	double ans=sqrt(pow(x,2)+pow(y,2));

	cout << ans << endl;
}