human
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
In a library, the librarian places a rare book on a designated shelf in the reference section. Patron A notices the book and moves it to a different shelf within the same section for easier access later. Patron B sees this and decides to hide the book behind other books on its original shelf. Later, the librarian retrieves the book from its hiding spot and returns it to her office for safekeeping. Where do Patron A, Patron B, and the librarian think the rare book is located? Respond very briefly.

### Response:
gpt
Patron A moved the rare book to a different shelf for easier access later. Because they have not seen anyone else move the book, they believe the book is still on that different shelf where they left it within the reference section.

Patron B saw Patron A move the book and then decided to hide it behind other books on its original shelf. Patron B then believes the book is hidden on the original shelf, as they personally moved it there.

The librarian, who last retrieved the book from the hiding spot behind other books on the original shelf, now has it in her office for safekeeping. Therefore, the librarian believes the book is in her office.