class ApplicationError(Exception):
    pass


class MathError(ApplicationError):
    pass


class NetworkingError(ApplicationError):
    pass


class CriticalFailure(ApplicationError):
    pass


class InvalidData(ApplicationError):
    pass


class ServerSideError(ApplicationError):
    pass


class MissingData(ApplicationError):
    pass


class FailedToSave(ApplicationError):
    pass