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

#define MAX 1010

typedef char Cislo[MAX];

char toDigit(char ch)
{
  if(isdigit(ch))
    return ch - '0';
  else
    return ch - 'A' + 10;
}

char toChar(char x)
{
  if(x < 10)
    return x + '0';
  else
    return x + 'A' - 10;
}

int ReadCislo(const char* str, Cislo c)
{
  //printf("Ctu cislo\n");
  int len = strlen(str);

  int i, j;

  for(i = 0, j = len - 1; j >= 0; ++i, --j) c[i] = toDigit(str[j]);

  return len;
}

void PrintCislo(Cislo c, int len)
{
  for(int i = len - 1; i >= 0; --i) putchar(toChar(c[i]));
}

char s1[MAX], s2[MAX];
Cislo c1, c2, v;

bool OneTask()
{
  int base;

  scanf("%d", &base);

  if(base == 0) return false;

  if(base == 1)
    {
      scanf("%s %s", s1, s2);
      if(s1[0] == '0')
	{
	  printf("%s + %s = %s\n", s1, s2, s2);
	}
      else if(s2[0] == '0')
	{
	  printf("%s + %s = %s\n", s1, s2, s1);
	}
      else 
	{
	  char s3[MAX * 2];
	  strcpy(s3, s1);
	  strcat(s3, s2);
	  printf("%s + %s = %s\n", s1, s2, s3);
	}
      return true;
    }

  int l1, l2, l;

  scanf("%s %s", s1, s2);
  l1 = ReadCislo(s1, c1);
  l2 = ReadCislo(s2, c2);

  l = l1 > l2 ? l1 : l2;
  for(int i = l1; i <= l; ++i) c1[i] = 0;
  for(int i = l2; i <= l; ++i) c2[i] = 0;

  int carry = 0;

  int i;
  for(i = 0; i < l || carry != 0; ++i)
    {
      v[i] = c1[i] + c2[i] + carry;
      carry = v[i] / base;
      v[i] = v[i] % base;
    }

  printf("%s + %s = ", s1, s2);
  PrintCislo(v, i);
  putchar('\n');

  return true;
}

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