#include <bits/stdc++.h>
using namespace std;
int n, cnt, arr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 11,
                     1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 11,
                     1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 11,
                     1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 11};
int main() {
  cin >> n;
  n -= 10;
  for (int i = 0; i < 55; ++i) {
    if (n == arr[i]) cnt++;
  }
  cout << cnt << endl;
}
