#include <bits/stdc++.h>
using namespace std;

void solve() {
  string c1, c2, c3, ans;
  cin >> c1 >> c2 >> c3;
  if (c2 == "?") ans = "14";
  if (c2 == "2") ans = "4";
  if (c2 == "3") ans = "1";
  cout << ans << endl;
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  solve();
}