#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ctype.h>

int main()

{

	char buf[256];

	int data, c, idx, length;

	unsigned char *imgbuf = NULL;

	char *p;

	c = 0;

	data = 0;

	idx = 0;

	length = 0;

	while (fgets(buf, sizeof(buf), stdin)) {

		if (strncmp(buf, "Bits:", 5) == 0) {

			for (p = buf + 5; *p && isspace(*p); p++)

				;

			if (! *p) {

				fprintf(stderr, "corrupted file in Bits line\n");

				return 1;

			}

			length = atoi(p);

			length /= 8;

			if (length <= 0) {

				fprintf(stderr, "corrupted file, detected length = %d\n", length);

				return 1;

			}

			imgbuf = malloc(length);

			if (! imgbuf) {

				fprintf(stderr, "cannot alloc %d bytes\n", length);

				return 1;

			}

			continue;

		}

		if (buf[0] != '0' && buf[1] != '1')

			continue;

		if (length <= 0) {

			fprintf(stderr, "corrupted file, starting without Bits line\n");

			return 1;

		}

		for (p = buf; *p == '0' || *p == '1'; p++) {

			data |= (*p - '0') << c;

			c++;

			if (c >= 8) {

				imgbuf[idx] = data;

				data = 0;

				c = 0;

				idx++;

				if (idx >= length)

					break;

			}

		}

	}

	if (c)

		imgbuf[idx++] = data;

	if (idx != length) {

		fprintf(stderr, "length doesn't match: %d != %d\n", idx, length);

		return 1;

	}

	for (idx = 0; idx < length; idx++)

		putchar(imgbuf[idx]);

	return 0;

}