#include <bits/stdc++.h>
using namespace std;
void solve() {
  map<int, int> mp;
  for (int i = 1; i <= 11; i++) {
    mp[i] = 4;
  }
  mp[10] += 11;
  int n;
  cin >> n;
  n -= 10;
  cout << mp[n] << endl;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  solve();
  return 0;
}
