#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  char a, b, c;
  cin >> a >> b >> c;
  if (b == '?') {
    cout << "14" << endl;
  }
  else {
    cout << (b == '3' ? '1' : '4') << endl;
  }
  return 0;
}