#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <sys/wait.h>

void receiver(int fd);
void sender(int fd);

int main() {

	int fds[2];
	pipe(fds);
	if (fork()) {
		receiver(fds[0]);
	} else if (fork()) {
		sender(fds[1]);	
	}
	wait(NULL);
}

void sender(int fd) {
	char * str;
	int len;
	int q = 0;

	while (q != EOF) {
		q = scanf(" %ms", &str);
		len = strlen(str);
		printf("%d\n",len);
		if (len == 1) break;
		write(fd, &len, sizeof(int));
		write(fd, str, len);
		free(str);
	}
	close(fd);
}

void receiver(int fd) {
	char * str;
	int len, q = 0;
	
	while (1) {
		q = read(fd, &len, sizeof(int));
		if (q == EOF) break;
		str = malloc(len * sizeof(char));
		q = read(fd, str, len);
		if (q == EOF) break;
		for (char * c = str; *c != '\0'; c++)
			*c = toupper(*c);
		puts(str);
		free(str);
	
	}
}