#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
int INF = 1LL << 30;
int MOD = 1e9+7;
main(){
    string a,b,c;
    cin >> a >> b >> c;
    if      (b == "?")cout << "14" << endl;
    else if (b == "2")cout << "4" << endl;
    else              cout << "1" << endl; 
}