#include "bits/stdc++.h"
using namespace std;
#define print(x) cout<<x<<endl;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a) for(int i=0;i<a;i++)
#define printall(n,array) {for(int i=0;i<n;i++){cout<<array[i]<<" ";}cout<<endl;}
#define U() cout<<endl;
typedef long long ll;
typedef pair<int, int> PI;
typedef pair<int, PI> V;
typedef vector<int> VE;
const ll mod = 1000000007; //10^9+7
 
int main(){
  string s[3];
  string t = "14";
  REP(i, 3){cin >> s[i];}
  if(s[1] == "?"){print(t);}
  else if(s[1] == "2"){print("4");}
  else if(s[1] == "3"){print("1");}
}