from abc import ABC, abstractmethod


class Implementation(ABC):
    """
    The Implementation defines the interface for all implementation classes. It
    doesn't have to match the Abstraction's interface. In fact, the two
    interfaces can be entirely different. Typically the Implementation
    interface provides only primitive operations, while the Abstraction defines
    higher-level operations based on those primitives.
    """

    @abstractmethod
    def operation_implementation(self) -> str:
        pass