#include <bits/stdc++.h>
using namespace std;
int main() {
  int sum;
  cin >> sum;
  sum = sum - 10;
  if (sum == 0) {
    cout << 0;
  } else if (sum == 11 || sum == 1) {
    cout << 4;
  } else if (sum == 10) {
    cout << 15;
  } else if (sum >= 2 && sum <= 9) {
    cout << 4;
  } else {
    cout << 0;
  }
  return 0;
}
