import java.util.Scanner;
public class Main {
    
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        String str1 = sc.next();
        String str2 = sc.next();
        int a = Integer.parseInt(str1.replaceAll("^0[x|X]",""),16);
        int b = Integer.parseInt(str2.replaceAll("^0",""),8);
        long sum = (long)a + (long)b;
        System.out.println(sum);
    }
}