#include<bits/stdc++.h>
#define REP(i, n) for (int i = 0; i < (int)(n); i++)
using ll = long long;
using namespace std;
int main() {
  int N;
  cin >> N;
  if(N == 5) {
    cout << 11 << endl;
  }
  if(N == 6) {
    cout << 11 << endl;
  }
  if(N == 11) {
    cout << 11 << endl;
  }
  if(N == 12) {
    cout << 11 << endl;
  }
  if(N == 14) {
    cout << 11 << endl;
  }
}