#include <bits/stdc++.h>
using namespace std;
int a[100] = {0, 4, 4, 4, 4, 4, 4, 4, 4, 4, 15, 4};
int n;
int main() {
  scanf("%d", &n);
  if (n <= 10)
    puts("0");
  else
    printf("%d\n", a[n - 10]);
}
