#include <stdio.h>

#define N 10000

char A[N],B[N],C[N];
int a[N],b[N],c[N];


void calc1() {
	int l1 = strlen(A);
	int l2 = strlen(B);
	int z;
	char *q = C;

	if(l1==1 && *A=='0')
		l1 = 0;
	if(l2==1 && *B=='0')
		l2 = 0;

	z = l1+l2;
	if(!z)
		*(q++)='0';
	while(z--)
		*(q++) = '1';
	*q = 0;

}

int cislo(char c) {
	if(c>='A')
		return c-'A'+10;
	return c-'0';
}

int base;

char toChar(int i) {
	if(i>=10)
		return('A'+i-10);
	return '0'+i;
}

void calc() {
	int l1 = strlen (A);
	int l2 = strlen (B);
	int l = l1;
  int i,j;
	char *q=C;
	int carry = 0;

	if(l1>l2)
		l = l2;

	for(i=0;i<l1;i++) {
		a[l1-i-1] = cislo(A[i]);
	}

	for(i=0;i<l2;i++) {
		b[l2-i-1] = cislo(B[i]);
	}
	
	for(i=0; i<l ; i++) {
		carry += a[i] + b[i];
		c[i] = carry % base;
		carry /= base;
	}

	for(;i<l1;i++) {
		carry +=a[i];
		c[i] = carry % base;
		carry /= base;
	}
	
	for(;i<l2;i++) {
		carry +=b[i];
		c[i] = carry % base;
		carry /= base;
	}

	if(carry) 
		*(q++) = '0'+carry;

	for(j=i-1;j>=0;j--)
		*(q++) = toChar(c[j]) ;
	*q=0;
	
}


int main(void) {

  while(1) {
		scanf("%d",&base);
		if(base<1)
			break;
		scanf("%s%s",A,B);
		if(base==1)
			calc1();
		else
			calc();
		printf("%s + %s = %s\n",A,B,C);
	}
	
	return 0;
}