#include <bits/stdc++.h>
using namespace std;
int n, ans = 0, base = 10;
int main(void) {
  cin >> n;
  for (int i = 0; i < 4; i++) {
    if (base + 1 == n || base + 11 == n) ans += 1;
  }
  for (int i = 2; i <= 10; i++) {
    if (base + i == n) {
      if (i == 10) {
        ans += 3;
      } else {
        ans += 4;
      }
    }
  }
  if (base + 10 == n) {
    ans += 4 * 3;
  }
  cout << ans << endl;
  return 0;
}
