class Vehicle:
    def __init__(self, brand: str, max_speed: int):
        self.brand = brand
        self.max_speed = max_speed

    def info(self) -> str:
        return f"{self.brand}, макс. скорость {self.max_speed} км/ч"


class Car(Vehicle):
    def __init__(self, brand: str, max_speed: int, doors: int):
        super().__init__(brand, max_speed)
        self.doors = doors

    def info(self) -> str:
        return f"Авто {self.brand}, {self.doors} двери, {self.max_speed} км/ч"


class Bike(Vehicle):
    def __init__(self, brand: str, max_speed: int, bike_type: str):
        super().__init__(brand, max_speed)
        self.bike_type = bike_type

    def info(self) -> str:
        return f"Велосипед {self.brand}, тип: {self.bike_type}, {self.max_speed} км/ч"