#!/usr/bin/env cscript
#include <stdio.h>

int
main(int argc, char *argv[]) {
	int index = 30, column_string_needle = 0;
	char column_string[3 + 1] = {0};

	while (index >= 26 + 1) {
		column_string[column_string_needle++] = index / 26 + ('A' - 1);
		index %= 26;
	}

	column_string[column_string_needle++] = index + ('A' - 1);

	printf("[%s]\n", column_string);
}