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

int
main(int argc, char *argv[]) {
	int alphabet_needle, index = 1, column_index_needle;
	char ALPHABET['Z' - 'A' + 1], column_index[3 + 1];

	for (alphabet_needle = 'A'; alphabet_needle <= 'Z'; alphabet_needle++) {
		ALPHABET[alphabet_needle - 'A'] = alphabet_needle;
	}

	ALPHABET['Z' - 'A' + 1] = '\0';

	for (column_index_needle = 0; index > 0; index /= 'Z' - 'A' + 1 ) {
		column_index[column_index_needle] = ALPHABET[index % ('Z' - 'A' + 1) - 1];
	}

	printf("%s\n", column_index);
}