#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "alloc.c"
#include "afree.c"

char *p, *q[10];

main(int argc, char *argv[])
{
	char buf[1000];
	FILE *fp;
	int i, j, k;

	if (argc > 1)
		fp = fopen(argv[1], "r");
	else
		fp = stdin;
	while (fgets(buf, sizeof(buf), fp) != NULL) {
		for (i = 0; i < 5; i++) {
			q[i] = (char *) alloc((k = rand() % 23));
			for (j = 0; j < k; j++)
				q[i][j] = 'x';
		}
		p = (char *) alloc(strlen(buf)+1);
		strcpy(p, buf);
		for (i = 5; i < 10; i++) {
			q[i] = (char *) malloc((k = rand() % 23));
			for (j = 0; j < k; j++)
				q[i][j] = 'y';
		}
		printf("%s", p);
		for (i = 9; i >= 5; i--)
			afree(q[i]);
		afree(p);
		for (; i >= 0; i--)
			afree(q[i]);
	}
	return 0;
}