#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  long long n;
  cin >> n;
  long long need = n - 10;
  if (need == 0) {
    cout << 0 << "\n";
    ;
  } else if (need >= 2 && need <= 9) {
    cout << 4 << "\n";
    ;
  } else if (need == 10) {
    cout << 15 << "\n";
    ;
  } else if (need == 1 || need == 11) {
    cout << 4 << "\n";
    ;
  } else {
    cout << 0 << "\n";
    ;
  }
  return 0;
}
