Instructions: Given a premise, an initial context, an original ending, and a counterfactual context, the task is to generate a new story ending aligned with the counterfactual context and as close to the original ending as possible. 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 and the story's general plot. The original ending is the last three sentences of the story. Also, a counterfactual context is a slight modification to the initial context. You should write a new story ending that edits the original story ending as little as possible to regain coherence with the counterfactual context. To sum up, you should write the last three sentences of a story based on the premise(first sentence) and the counterfactual context(second sentence) of the story.
Input: Premise: Shawn is out shopping one day. 
 Initial Context: He needed a good pair of jeans at the Mall. 
 Original Ending: After buying his jeans he walks by an animal shop and sees a dog. Shawn falls in love with the dog at the store. Shawn buys the dog and the two become best friends. 
 Counterfactual Context: He bought cat food.
Output:
While buying his cat food at the animal shop, he sees a dog. Shawn falls in love with the dog at the store. Shawn buys the dog and the two become best friends. 