Definition: Given a premise, an initial context, an original ending, and a new ending, the task is to generate the counterfactual context that is aligned with the new ending. Each instance consists of a five-sentence story. The premise is the first sentence of a story, and the second sentence, which is the initial context, provides more information about the story's context. The original ending is the last three sentences of the story. Also, you are given a new ending that can provide the new story with the same premise. You should write a counterfactual context to explain the small differences between the original and new endings. More specifically, a story context contains the general plot of the story. And a counterfactual context is a slight modification to the initial context. To sum up, you should write the second sentence of a story based on the premise(first sentence) and the new ending(last three sentences) of the story.
Input: Premise: Ben decided to visit the pet store. 
 Initial Context: He spent most of his time searching for a pair of goldfish. 
 Original Ending: The cashier caught his attention and showed him around the store. He even persuaded Ben to purchase a hamster. At the end of the day, Ben took home the hamster and a few supplies. 
 New ending: The cashier caught his attention and showed him around the store. He even persuaded Ben to purchase a white rat. At the end of the day, Ben took home the white rat and a few supplies. 
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
He was interested in any pet besides a hamster.