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

long cislo( char *s, long zaklad ) 
{
	long c, i;

	c = 0;
	for ( i = 0; s[ i ]; i++ ) {
		if ( s[ i ] <= '9' ) {
			c = c * zaklad + s[ i ] - '0';
		} else {
			c = c * zaklad + upper( s[ i ] ) - 'A' + 10;
		}
	}
	return c;
}

char vysledok[ MAX + 2 ];

char *string( long cislo, long zaklad )
{
	long c;
	char *s;

	if ( !cislo )
		return "0";
	s = vysledok + MAX + 1;
	*s = 0;
	while ( cislo ) {
		c = cislo % zaklad;
		cislo = cislo / zaklad;
		s--;
		if ( c > 9 ) {
			*s = 'A' + c - 10;
		} else {
			*s = '0' + c;
		}
	}
	return s;
}

int main( void )
{
	long zaklad, i;
	char s1[ MAX + 1 ], s2[ MAX + 1 ];
	long c1, c2;

	while ( 1 ) {
		scanf( "%ld\n", &zaklad );
		if ( !zaklad ) 
			return 0;
		scanf( "%s %s\n", s1, s2 );
		if ( zaklad == 1 ) {
			printf( "%s + %s = ", s1, s2 );
			for ( i = strlen( s1 ) + strlen( s2 ); i > 0; i-- )
				printf( "1" );
			printf( "\n" );
		} else {
			c1 = cislo( s1, zaklad );
			c2 = cislo( s2, zaklad );
			printf( "%s + %s = %s\n", s1, s2, string( c1 + c2, zaklad ) );
		}
	}
}