#include <bits/stdc++.h>
int main() {
  int n, r;
  scanf("%d", &n);
  r = n - 10;
  if (r > 0 && r <= 11) {
    if (r == 1 || r == 2 || r == 3 || r == 4 || r == 5 || r == 6 || r == 7 ||
        r == 8 || r == 9)
      printf("4\n");
    else if (r == 10)
      printf("15\n");
    else if (r == 11)
      printf("4\n");
  } else
    printf("0\n");
}
