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

int pocitej()
{
   int z = 0;
   scanf("%d", &z);
   if(z==0)
      return 0;
#define MAX 1005
   char c1[MAX], c2[MAX], v[MAX];
   char c1p[MAX], c2p[MAX];
   c1[0] =0;
   c2[0] = 0;
   scanf("%s %s", c1, c2);
   strcpy(c1p, c1);
   strcpy(c2p, c2);
   if(z==1)
   {
      if(c1[0] == '0')
         c1[0] = 0;
      if(c2[0]== '0')
         c2[0] = 0;
      if(c1[0] ==0 && c2[0]==0)
         strcpy(c1, "0");

      printf("%s + %s = %s%s\n", c1p, c2p, c1, c2);
      return 1;
   }
   int lc1=strlen(c1);
   int lc2=strlen(c2);
   int prevod = 0;
//   printf("pred prevodem\n");
   for(int i=0; i<MAX; i++)
   {
      v[i] = 0;
      if(lc1-i-1 >=0)
         c1[MAX-i-1] = (c1[lc1-i-1]>='A' && c1[lc1-i-1]<='Z')?c1[lc1-1-i]-'A'+10:c1[lc1-1-i]-'0';
      else
         c1[MAX-i-1] = 0;
      if(lc2-i-1>=0)
         c2[MAX-i-1] = (c2[lc2-i-1]>='A' && c2[lc2-i-1]<='Z')?c2[lc2-1-i]-'A'+10:c2[lc2-1-i]-'0';
      else
         c2[MAX-i-1] = 0;
   }
  // for(int i=0; i<MAX;i++)
    //  printf("i=%d c1[i]=%d c2[i]=%d\n", i, c1[i], c2[i]);


   //printf("pred vypoctem\n");
   for(int i = MAX-1; i>=0 && (c2[i]!=0 || c1[i]!=0 || prevod!=0);i--)
   {
      v[i] = prevod+c1[i]+c2[i];
      prevod = v[i]/z;
      v[i] = v[i]%z;
   }
   int last;
   //printf("pred vypsanim\n");
   for(int i=MAX-1; i>=0; i--)
   {
      //printf("i=%d, V[i]=%d\n", i, v[i]);
      if(v[i]!=0)
         last = i;
      v[i] = (v[i]>9)?v[i]-10+'A':v[i]+'0';
   }
   char pom[MAX];
   //printf("pred strcpy\n");
   strncpy(pom, (v+last), MAX-last);
   pom[MAX-last] = 0;
   printf("%s + %s = %s\n", c1p, c2p, pom);
   return 1;
}

int main()
{
   while(pocitej() != 0);
   return 0;
}