#include <bits/stdc++.h>
using namespace std;
const int k[12] = {0, 4, 4, 4, 4, 4, 4, 4, 4, 4, 15, 4};
int main() {
  int n;
  while (~scanf("%d", &n)) {
    if (n <= 10 || n > 21)
      printf("0\n");
    else
      printf("%d\n", k[n - 10]);
  }
  return 0;
}
