import java.util.Scanner;
  
    public class Main {
         public static void main(String[] args) {
           Scanner sc = new Scanner(System.in);
           
           String[] s = new String[3];
           for(int i=0; i<3; i++){
               s[i]= sc.next();
           }
           if(s[1].equalsIgnoreCase("2")){
               System.out.println("4");
           }else if(s[1].equalsIgnoreCase("3")){
               System.out.println("1");
           }else if(s[1].equalsIgnoreCase("?")){
               System.out.println("14");
           }
    }
}