#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef string str;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    str s;
    cin >> s;
    ll x = 0, y = 0;
    for (char c : s)
    {
        if (c == 'N') y++;
        else if (c == 'S') y--;
        else if (c == 'E') x++;
        else if (c == 'W') x--;
    }
    double p = sqrt(1.0 * x * x + 1.0 * y * y);
    if (p == floor(p)) cout << (ll)p << "\n";
    else cout << fixed << setprecision(5) << p << "\n";
    return 0;
}