#include <bits/stdc++.h>
int main() {
  int n;
  scanf("%d", &n);
  if (n < 10) {
    printf("%d", 0);
  }
  switch (n - 10) {
    case 0:
      printf("%d", 0);
      break;
    case 1 ... 9:
      printf("%d", 4);
      break;
    case 10:
      printf("%d", 15);
      break;
    case 11:
      printf("%d", 4);
      break;
    case 12 ... 25:
      printf("%d", 0);
      break;
  }
}
