#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, i;
  cin >> n;
  int k = 10;
  int a[14] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 10, 10, 10};
  int b[13] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 10, 10};
  int count = 0;
  for (i = 0; i < 14; i++) {
    if (k + a[i] == n) count++;
  }
  count = count * 3;
  for (i = 0; i < 13; i++) {
    if (k + b[i] == n) count++;
  }
  cout << count << endl;
  return 0;
}
