#include <stdio.h>

char mod(int a, int b)
{
  char c = a % b;
  if (c < 10) c += '0';
  else c += 'A' - 10;
  return c;
}

int get_num(char *c, int index)
{
   if (index < 0) return 0;
   if (c[index] <= '9') return c[index] - '0';
   return c[index] - 'A' + 10;
}

int set_num(char *c, int index, int num, int so)
{
   c[index] = mod(num, so);
   return num / so;
}

int radek() 
{  int so;
   char a[1001];
   char b[1001];
   char c[1002];
   int ia, ib, ic;
   int zb;
   int i;
   scanf("%d", &so);
   if (so == 0) return  0;
   scanf("%s %s\n", a, b);
   
   printf("%s + %s = ", a, b);

   if (so == 1) {
      zb = 0;
      if (a[0] != '0') zb += strlen(a);
      if (b[0] != '0') zb += strlen(b);
      if (zb == 0)
         printf("0");
      else 
         for (i = 0; i < zb; i++)
            printf("1");
      printf("\n");
      return 1;
   }


   ia = strlen(a) - 1;
   ib = strlen(b) - 1;
   ic = 0;
   zb = 0;
   while (ia > -1 || zb > 0 || ib > -1) {
      zb = set_num(c, ic, get_num(a, ia) + get_num(b, ib) + zb, so);
      ia--;
      ib--;
      ic++;
   }
   c[ic] = '\0';
   
   for (ic--; ic > -1; ic--)
      printf("%c", c[ic]);
      
   printf("\n");
   return 1;
}


int main() {
   while (radek()) ;
   return 0;
}