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

int main(){
    char c1,c2,c3;
    cin >> c1 >> c2 >> c3;

    if(c2=='?'){
        cout << "14";
    }else{
        if(c2=='2') cout << '4';
        else cout << '1';
    }
    cout << endl;

    return 0;
}