#include <bits/stdc++.h>
using namespace std;
int n;
int main() {
  cin >> n;
  n -= 10;
  if (n <= 0)
    cout << 0 << endl;
  else if (n <= 9)
    cout << 4 << endl;
  else if (n == 10)
    cout << 15 << endl;
  else if (n == 11)
    cout << 4 << endl;
  else
    cout << 0 << endl;
}
