classDiagram
class Person {
  String name
}
class Store {
  List phoneStock
  Phone providePhone(deviceModel, language)
}
class Phone {
  String language
  String deviceModel
  turnOn()
}
class SamsungPhone {
  turnOn()
}
class ApplePhone {
  turnOn()
}
class Customer {
  String language
  Phone phone
  purchasePhone(Store, deviceModel)
  turnOnPhone()

}
Phone <|-- SamsungPhone
Phone <|-- ApplePhone
Person <|-- Customer
Store o-- Phone
Customer o-- Phone