#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int n;
  cin >> n;
  long long int a = n - 10;
  if (a >= 1 && a <= 9)
    cout << 4;
  else if (a == 0)
    cout << 0;
  else if (a == 10)
    cout << 15;
  else if (a == 11)
    cout << 4;
  else
    cout << 0;
}
