/*
 * base 9 adder
 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int 
ten_2_nine (int n);

int
main (void)
{
	int n, m;
	char s [100], *ptr;

	while (gets (s) != NULL) {
		ptr = strtok (s, " ");
		n = strtol (ptr, (char **)NULL,  9);
		ptr = strtok (NULL, " ");
		m = strtol (ptr, (char **)NULL, 9);

		printf ("%d\n", ten_2_nine (n + m));
	}

	return 0;
}

int
ten_2_nine (int n)
{
	char tmp [100];
	int i, r;

	tmp [99] = '\0';

	for (i = 0; i <= 98; i++)
		tmp [i] = '0';

	i = 98;

	while (n) {
		r = n % 9;
		tmp [i] = r + '0';
		i--;
		n = n / 9;
	}

	return (atoi (tmp));
}