#include <bits/stdc++.h>
using namespace std;
int main() {
  int t, sum, i;
  cin >> t;
  if (t <= 10)
    cout << "0" << endl;
  else if (t > 21)
    cout << "0" << endl;
  else if (t == 21)
    cout << "4" << endl;
  else if (t == 20)
    cout << "15" << endl;
  else if (t == 11)
    cout << "4" << endl;
  else
    cout << "4" << endl;
}
