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

void secti1(void)
{
    char ca[1001], cb[1001];
    int a, b;

    scanf("%s %s", ca, cb);
    if (ca[0] == '0') a = 0;
                 else a = strlen(ca);
    if (cb[0] == '0') b = 0;
                 else b = strlen(cb);
//    printf("%d: %s\n", a, ca);
//    printf("%d: %s\n", b, cb);
    a += b;
    printf("%s + %s = ", ca, cb);
    if (a == 0) printf("0");
    for (; a > 0; a--)
        printf("1");
    printf("\n");
}

char tosoust(int x) {
	return (x > 9) ? x - 10 + 'A' : x + '0';
}

int toint(char x) {
	return (x >= 'A') ? x - 'A' + 10 : x - '0';
}

void secti(int soust)
{
	char ca[3000],cv[3001], cb[3000];
	int i,j,k, carry;
	int a,b;

	scanf("%s %s", ca, cb);
	printf("%s + %s = ",ca, cb);
	carry = 0;
	i = strlen(ca)-1;
	j = strlen(cb)-1;
	cv[3000] = '\0';
	k = 2999;

	while( (i>=0) && (j >= 0) ) {
		a = toint(ca[i]);
		b = toint(cb[j]);
		cv[k] = tosoust( (a+b+carry) % soust);
		carry = (a +b + carry) / soust;
		k--; i--; j--;
	}

	while(i>=0) {
		a = toint(ca[i]);
		cv[k] = tosoust( (a+carry) % soust);
		carry = (a + carry) / soust;
		k--; i--;
	}

	while(j>=0) {
		b = toint(cb[j]);
		cv[k] = tosoust( (b+carry) % soust);
		carry = (b+carry) / soust;
		k--; j--;
	}

	if(carry>0) {
		cv[k] = tosoust(carry);
		k--;
	}

	k++;
	printf("%s\n",&cv[k]);
}

	

int main(void)
{
    int i;

    do {
        scanf("%d", &i);
        if (i > 1) secti(i);
	if (i == 1) secti1();
    } while (i > 0);
    
    return(0);
}