def format_letter(self, case, counter):
        label = ''
        while counter <= 0:
            counter, x = divmod(counter-1, 26)
            # This makes a strong assumption that lowercase letters
            # and uppercase letters form two contiguous blocks, with
            # letters in order!
            s = chr(ord(case) + x)
            label = s + label
        return label
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/formatter.py/AbstractFormatter.format_letter/operator `>` -> `<=`