#include <stdio.h>

static unsigned long crctable[256];
static unsigned char crcinvtable[256];

void calc_crc_table(void)
{
	unsigned long poly = 0xedb88320, value, idx, i;

	for (idx = 0 ; idx < 256 ; idx++) {
		for (value = idx, i = 0 ; i < 8 ; i++) {
			if (value & 1) {
				value >>= 1;
				value ^= poly;
			} else {
				value >>= 1;
			}
		}
		crctable[idx] = value;
		crcinvtable[value >> 24] = idx & 0xff;
	}
}

static inline unsigned long iter_crc(unsigned long crc, unsigned char chr)
{
	return (crc >> 8) ^ crctable[chr ^ (crc & 255)];
}

unsigned long calc_crc(char *buf, unsigned long buflen)
{
	unsigned long crc = 0xffffffff;
	while (buflen--)
		crc = iter_crc(crc, *buf++);
	return ~crc;
}

static inline unsigned char l2c(unsigned long l, int nr) { return (l >> (8*(nr-1))) & 0xff; }

void showmatch(unsigned char *b1, unsigned char *b2, unsigned char a, unsigned char b, unsigned char c, unsigned char d, unsigned char e)
{
	unsigned long i;
	printf("match with [");
	b1[10] = a;
	b1[12] = b;
	b1[14] = c;
	b1[16] = d;
	b1[18] = e;
	b2[10] = b2[12] = b2[14] = b2[16] = b2[18] = 0;
	for (i=0 ; i<19 ; i++)
		printf("0x%.2x, ", b1[i] ^ b2[i]);
	printf("]\n");
	fflush(stdout);
	_exit(0);
}
void bf(unsigned char *buffer, unsigned char *ref)
{
	unsigned long i, shtarget, sh0, sh1, sh2, sh3, sh4;
	unsigned char a, b, c, d, e, targethi;
	
	shtarget = 0xffffffff;
	for (i=0 ; i<19 ; i++)
		shtarget = iter_crc(shtarget, 0);
	
	targethi = shtarget >> 24;
	
	sh0 = 0xffffffff;
	for (i=0 ; i<10 ; i++)
		sh0 = iter_crc(sh0, buffer[i] ^ ref[i]);

	for (a=0 ; a<128 ; a++) {
		sh1 = iter_crc(iter_crc(sh0, a), buffer[11] ^ ref[11]);
		for (b=0 ; b<128 ; b++) {
			sh2 = iter_crc(iter_crc(sh1, b), buffer[13] ^ ref[13]);
			for (c=0 ; c<128 ; c++) {
				sh3 = iter_crc(iter_crc(sh2, c), buffer[15] ^ ref[15]);
				for (d=0 ; d<128 ; d++) {
					sh4 = iter_crc(iter_crc(sh3, d), buffer[17] ^ ref[17]);

					e = crcinvtable[targethi] ^ (sh4 & 255);
				
					sh4 = iter_crc(sh4, e);
					if (sh4 == shtarget)
						showmatch(buffer, ref, a, b, c, d, e);
				}
				
			}
		}
	}
}

int main(int argc, char **argv)
{
	calc_crc_table();
	
	if (argc < 3)
		_exit(0);
	bf(argv[1], argv[2]);
	
	return 0;
}