#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>

int main()
{
	int des[2];
	pipe(des);
	
	pid_t pid = fork();
		
	if (pid == -1) {
		printf("failed");
		return 0;
	}
	else if (pid == 0) {
	char x;
		while (read(des[1], &x, 1)) {
			printf("%c%c%c%c",x,x,x,x);
		}
	} else {
		char xxx;
		while (read(0, &xxx, 1)) {
			write(des[0],  &xxx, 1);
			if (xxx == 'h') break;
		}
	}
	return 0;
}