import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner inScanner = new Scanner(System.in);
        while(inScanner.hasNext()) {
            long l = Long.parseLong(inScanner.next().replaceAll("\\+", ""),16)
                    + Long.parseLong(inScanner.next().replaceAll("\\+", ""),16);
            if(l<0) {
                System.out.println("-" + Long.toHexString(-l).toUpperCase());
            }
            else {
                System.out.println(Long.toHexString(l).toUpperCase());
            }
        }
    }
}