#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n >= 0 && n <= 10)
    cout << "0";
  else if (n >= 12 && n <= 19)
    cout << "4";
  else if (n >= 22 && n <= 25)
    cout << "0";
  else if (n == 11 || n == 21)
    cout << "4";
  else if (n == 20)
    cout << "15";
  return 0;
}
