class BellTower:
    def __init__(self, list_bells):
        self.list_bells = list_bells

    def sound(self):
        for i in self.bells_list:
            i.sound()
        print("...")

    def append(self, item):
        self.list_bells.append(item)

    def print_info(self):
        self.string = ""
        for i in sorted(self.dict_info):
            self.string += f"{i}: {self.dict_info.get(i)}, "
        if self.info:
            if self.dict_info:
                self.string = self.string[:-2] + "; "
            for i in self.info:
                self.string += f"{i}, "
        self.string = self.string[:-2]
        if self.string:
            print(self.string)
        else:
            print("-")


class BigBell(BellTower):
    def __init__(self, *args, **kwargs):
        self.dict_info = kwargs
        self.info = args
        self.count = 1

    def sound(self):
        if self.count == 1:
            self.count = 2
            print("ding")
        else:
            self.count = 1
            print("dong")


class LittleBell(BellTower):
    def __init__(self, *args, **kwargs):
        self.dict_info = kwargs
        self.info = args

    def sound(self):
        print("ding")


bt = BellTower(BigBell("бронзовый"),
               LittleBell("медный", нота="ля"))