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