#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  int n, count = 0, sum = 0;
  cin >> n;
  n -= 10;
  if (n <= 0) cout << "0";
  if (n <= 9 && n >= 1) cout << "4";
  if (n == 10) cout << "15";
  if (n == 11) cout << "4";
  if (n >= 12) cout << "0";
  return 0;
}
