#!/usr/bin/env cscript
#include <stdio.h>
#define ALPHABET "ABCDEFGHIJKLMNOPWRSTUVWXYZ"
int
main(int argc, char *argv[]) {
	int column_index = 1, needle_column_index_string;
	char column_index_string[3 + 1];

	needle_column_index_string = 0;

	do {
		column_index_string[needle_column_index_string++] = column_index % ('Z' - 'A' + 1) + '@';
		column_index /= ('Z' - 'A' + 2);
	} while (column_index > 0);

	puts(column_index_string);
	return 0;
}