#include <stdio.h>
#include <ctype.h>
#define MAX  1000

int zaklad;

long cifra( char c ) 
{
	if ( c <= '9' ) {
		return  c - '0';
	} else {
		return  toupper( c ) - 'A' + 10;
	}
}

char vysledok[ MAX + 2 ];

int main( void )
{
	int i, j;
	char s1[ MAX + 1 ], s2[ MAX + 1 ];
	char *vys;
	int vysx;
	int pretec;

	vysledok[ sizeof( vysledok ) - 1 ] = 0;
	while ( 1 ) {
		scanf( "%d\n", &zaklad );
		if ( !zaklad ) 
			return 0;
		scanf( "%s %s\n", s1, s2 );
		if ( zaklad == 1 ) {
			if ( *s1 == '0' ) {
				printf( "%s + %s = %s\n", s1, s2, s2 );
			} else if ( *s2 == '0' ) {
				printf( "%s + %s = %s\n", s1, s2, s1 );
			} else {
				printf( "%s + %s = ", s1, s2 );
				for ( i = strlen( s1 ) + strlen( s2 ); i > 0; i-- )
					printf( "1" );
				printf( "\n" );
			}
		} else {
			pretec = 0;
			i = strlen( s1 ) - 1;
			j = strlen( s2 ) - 1;
			vys = vysledok + MAX + 1;
			while ( ( i >= 0 ) && ( j >= 0 ) ) {
				vysx = pretec;
				if ( i >= 0 ) {
					vysx += cifra( s1 [ i ] );
					i--;
				}
				if ( j >= 0 ) {
					vysx += cifra( s2 [ j ] );
					j--;
				}
				if ( vysx >= zaklad ) {
					pretec = 1;
					vysx -= zaklad;
				} else {
					pretec = 0;
				}
				if ( vysx >9 ) {
					*--vys = 'A' + vysx - 10;
				} else {
					*--vys = '0' + vysx;
				}
			}
			if ( pretec ) {
				vys--;
				*vys = '1';
			}
			while ( *vys == '0' )
				vys++;
			if ( !*vys ) {
				vys--;
				*vys = '0';
			}
			printf( "%s + %s = %s\n", s1, s2, vys );
		}
	}
}