import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            String c1 = in.next();
            String c2 = in.next();
            String c3 = in.next();
            String ans;
            if (c2.equals("?")) {
                ans = "14";
            } else {
                if (c2.equals("3")) ans = "1";
                else ans = "4";
            }
            out.println(ans);
        }

    }
}