#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  int ans = 0;
  scanf("%d", &n);
  n -= 10;
  if (n <= 10 && n >= 2) ans += 4;
  if (n == 10)
    ans += 11;
  else if (n == 11)
    ans += 4;
  else if (n == 1)
    ans += 4;
  printf("%d\n", ans);
  return 0;
}
