#include <bits/stdc++.h>
using namespace std;
int n;
int main() {
  int card[12];
  for (int i = 1; i <= 11; i++) card[i] = 4;
  card[10] *= 4;
  card[10]--;
  scanf("%d", &n);
  int b = n - 10;
  int w = 0;
  for (int i = 1; i <= 11; i++) {
    if (b - i == 0) w += card[i];
  }
  printf("%d\n", w);
  return 0;
}
