#include <stdio.h>
int secti(char c1,char c2,int pr){
int i1=(c1>='A') ? c1-'A'+10 : c1-'0';
int i2=(c2>='A')?c2-'A'+10 : c2-'0';
int i3=i1+i2+pr;
//printf( "p%d + %d + %d = %d\n",i1,i2,pr,i3);
return i3;
}


main(){
char s1[1001],s2[1001],s3[2001];
int z;
scanf("%d",&z);
while(z){
scanf("%s%s",s1,s2);
int l1=strlen(s1),l2=strlen(s2),i1=l1-1,i2=l2-1,i3;
if (z==1) { //1 sou.
i1=(*s1=='0') ? 0 : l1;
i2=(*s2=='0') ? 0 : l2;
int l3=i1+i2;
if (!l3)strcpy(s3, "0");
else{ for(int i=0;i<l3;i++) s3[i]='1';
s3[l3]='\0';}
printf("%s + %s = %s\n",s1,s2,s3);
}

else {//jina soustava nez 1
s3[2000]=0;i3=1999;int pr=0;
while(i1>=0 || i2>=0){
char c1 = (i1<0) ? '0' : s1[i1];
char c2 = (i2<0) ? '0': s2[i2];
int sou=secti(c1,c2,pr);
if (sou>=z) { pr=1; sou-=z; }
else { pr=0;}
s3[i3] = (sou>=10) ? sou+'A'-10 : sou+'0';
i1--;i2--;i3--;
}//while
if (pr) s3[i3--]='1';
printf("%s + %s = %s\n", s1,s2,s3+(i3+1));
} // if else
scanf("%d",&z);
}return 0;}