#!/usr/bin/env cscript
#include <stdio.h>
#include <string.h>
#define ALPHABET "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

int
main(int argc, const char *argv[]) {
	char column_string[3 + 1], *needle_column_string;

	strcpy(column_string, "A");

	needle_column_string = &column_string[strlen(column_string) - 1];

	for (int index = 1; index <= 78; index++) {
		puts(column_string);

		if (*needle_column_string == 'Z') {
			*needle_column_string = 'A';
			*(needle_column_string + 1) = 'A';
		} else {
			*needle_column_string += 1;
		}
	}

	return 0;
}