#include <bits/stdc++.h>
using namespace std;
int a[100], b[100];
int main() {
  int n, m;
  cin >> n;
  n = n - 10;
  if (n <= 0 || n >= 12) {
    cout << "0" << endl;
    return 0;
  }
  if (n >= 2 && n <= 9) {
    cout << "4" << endl;
    return 0;
  }
  if (n == 10) {
    cout << "15" << endl;
    return 0;
  }
  if (n == 1 || n == 11) cout << "4" << endl;
  return 0;
}
