#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>	/* for toupper */

int main()
{
	char line[256];
	int i;

	printf("Tell me a knock-knock joke.\n");
	gets(line);
	printf("Who's there?\n");
	gets(line);
	line[0] = toupper(line[0]);
	printf("%s who?\n", line);
	gets(line);

	for (i = 1; i <= 10; ++i) {
		printf("HAR! ");
	}
	printf("\n");

	return EXIT_SUCCESS;
}