#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <typename T>
using vc = vector<T>;
int main() {
  int ar[11] = {4, 4, 4, 4, 4, 4, 4, 4, 4, 15, 4};
  int n;
  cin >> n;
  if (n - 10 < 1 || n - 10 > 11)
    cout << 0;
  else
    cout << ar[n - 1 - 10];
}
