#include <bits/stdc++.h>
using namespace std;
int main() {
  int a[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 11, 1};
  int l = sizeof(a) / sizeof(int);
  int n;
  cin >> n;
  if (n == 20) {
    cout << 15;
    return 0;
  }
  int ans = 0;
  for (int i = 0; i < l; i++) {
    if (a[i] + 10 == n) {
      ans++;
    }
  }
  cout << ans * 4;
  return 0;
}
