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

### Instruction:
Three friends - Lily, Mia, and Noah - go to a bookstore together. Lily buys a mystery novel, Mia purchases a romance book, and Noah gets a science fiction story. Afterward, they head to a coffee shop to read their new books. While at the coffee shop, Lily goes to the restroom, and during that time, Mia decides to swap her romance book with Lily's mystery novel as a prank. However, unbeknownst to them, Noah also swaps his science fiction book with Lily's mystery novel while Mia isn't looking. When Lily returns, what does she think happened to her book, and who does she believe is responsible?

Provide a very brief response.

### Response:
gpt
When Lily returns from the restroom, she will find a science fiction book where she left her mystery novel. Given that she was only aware of a single swap prank planned with Mia concerning a romance book, she will likely be confused. Initially, she might suspect Mia is responsible since they had planned a prank. However, since the book she finds is not a romance novel but a science fiction story, she might not jump directly to conclusions about who swapped the book without first asking her friends what happened. She could consider a few possibilities: Mia changed her mind and swapped a different book instead, Noah played a prank, or perhaps there was some sort of mistake. Without clear evidence indicating who is responsible, she may inquire with both of her friends to understand what happened.