def encode(self, uuid, pad_length=22):
        """
        Encodes a UUID into a string (LSB first) according to the alphabet
        If leftmost (MSB) bits 0, string might be shorter
        """
        return self._num_to_string(uuid.int, pad_to_length=pad_length)
Encodes a UUID into a string (LSB first) according to the alphabet
        If leftmost (MSB) bits 0, string might be shorter