class BCCCalculator:
    """
    Класс для работы с BCC
    """
    
    @staticmethod
    def xor_bcc(data):
        """XOR BCC"""
        if isinstance(data, str):
            data = data.encode('utf-8')
        elif isinstance(data, list):
            data = bytes(data)
        
        bcc = 0
        for byte in data:
            bcc ^= byte
        return bcc
    
    @staticmethod
    def sum_bcc(data):
        """Суммирование BCC"""
        if isinstance(data, str):
            data = data.encode('utf-8')
        elif isinstance(data, list):
            data = bytes(data)
        
        total = sum(data)
        return total & 0xFF
    
    @staticmethod
    def verify_bcc(data_with_bcc):
        """
        Проверка BCC в данных
        """
        if len(data_with_bcc) < 2:
            return False
        
        data = data_with_bcc[:-1]
        expected_bcc = data_with_bcc[-1]
        calculated_bcc = BCCCalculator.xor_bcc(data)
        
        return expected_bcc == calculated_bcc