import java.util.*;

public class Main{
  static StringBuilder sb = new StringBuilder("");
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String s1 = sc.next();
    String s2 = sc.next();
    String s3 = sc.next();
    String result;
    if (s2.equals("?")) {
      result="14";
    }else{
      if (s2.equals("2")) {
        result="4";
      }else{
        result="1";
      }
    }
    System.out.println(result);
  }
}