#include <stdio.h>
#include <stdlib.h>

#define MAX 1024

size_t
convert (unsigned char *src)
{
  unsigned char *p;

  p = src;
  while (*p != 0)
    {
      if (*p >= '0' && *p <= '9')
	*p -= '0';
      else
	*p -= 'A' - 10;
      p++;
    }
  return p - src;
}

int
main (void)
{
  for (;;)
    {
      unsigned base;
      unsigned char buf1[MAX], buf2[MAX], *p1, *p2, *e1, *e2, *s;
      size_t l1, l2;

      scanf ("%u", &base);
      if (base  == 0)
	break;
      buf1[0] = 0;
      buf2[0] = 0;
      scanf ("\n%s %s", buf1 + 1, buf2 + 1);
      printf ("%s + %s = ", buf1 + 1, buf2 + 1);
      if (base != 1)
	{
	  l1 = convert (buf1 + 1);
	  l2 = convert (buf2 + 1);
	  if (l1 >= l2)
	    {
	      p1 = buf1;
	      e1 = p1 + l1 + 1;
	      p2 = buf2 + 1;
	      e2 = p2 + l2;
	    }
	  else
	    {
	      p2 = buf1 + 1;
	      e2 = p1 + l1;
	      p1 = buf2;
	      e1 = p2 + l2 + 1;
	    }
	  s = e1 - 1;
	  /* len (1) >= len (2) */
	  while (e2-- > p2)
	    {
	      *s += *e2;
	      s[-1] += *s / base;
	      *s %= base;
	      s--;
	    }
	  while (s > p1)
	    {
	      s[-1] += *s / base;
	      *s %= base;
	      s--;
	    }
	  if (*p1 == 0)
	    p1++;
	  while (p1 < e1)
	    {
	      putchar (*p1 < 10 ? '0' + *p1 : 'A' + *p1 - 10);
	      p1++;
	    }
	  putchar ('\n');
	}
      else
	{
	  if (buf1[1] == '0')
	    printf ("%s\n", buf2 + 1);
	  else if (buf2[1] == '0')
	    printf ("%s\n", buf1 + 1);
	  else
	    printf ("%s%s\n", buf1 + 1, buf2 + 1);
	}
    }
  return EXIT_SUCCESS;
}