import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s1 = in.next();
        String s2 = in.next();
        String s3 = in.next();

        String ans = "";
        if(s2.equals("?")) {
            ans = "14";
        } else {
            if(s2.equals("2")) ans = "4";
            else ans = "1";
        }

        System.out.println(ans);
    }
}