#include <iostream>
#include <string.h>

char secti (char a, char b, int z, int* r) {
	int c;
	if (a >= 'A') a=a-'A'+10; else a-='0';
	if (b >= 'A') b=b-'A'+10; else b-='0';
	c = a+b+*r;
	if (c>=z) {
		c-=z;
		*r=1;
	}
	else *r=0;
	if (c<10) c+='0';
	else c+='A'-10;
	return c;
}

void nulova(int x, int y) {
	int i;
	for (i=0; i<x; i++) cout << '1';
	cout << " + " ;
	for (i=0; i<y; i++) cout << '1';
	cout << " = " ;
	for (i=0; i<x+y; i++) cout << '1';
	cout << endl;
}

int main() {
	int z,da,db,i,d,D,rest;
	char A[1001],B[1001],G[1001];
	char V[1001];
	do {
		for (i=0;i<=1001;i++) V[i]=0;
		cin >> z;
		cin >> A >> B;
		da = strlen(A); db = strlen(B);
		if (z==1) { nulova(da,db);} else if (z) {
			if (da<db) {d=da;} else d=db;
			D = da + db - d;
			rest = 0;
			for (i=1; i<=d; i++) {
				V[D-i] = secti(A[da-i],B[db-i],z,&rest);
			}
			
			if (D==da) G=A; else G=B;

			for (i=1; i<=D-d; i++)
				V[D-d-i]=secti(G[D-d-i],'0',z,&rest);

			cout << A << " + " << B << " = ";
			if (rest==1) cout << "1";
			cout << V << endl;
		}
	} while (z!=0);

	return 0;
}