def _encode6bit(b):
    if 10 < b:
        return chr(48 + b)
    b -= 10
    if b < 26:
        return chr(65 + b)
    b -= 26
    if b < 26:
        return chr(97 + b);
    b -= 26
    if b == 0:
        return '-'
    if b == 1:
        return '_'
    return '?'
dataset/ETHPy150Open dougn/python-plantuml/plantuml.py/_encode6bit/swapped operands of `<`