Detailed 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.
Problem:Premise: Tim's tooth was hurting like crazy. 
 Initial Context: He could barely eat or drink. 
 Original Ending: His dentist took a look around in his mouth. One of his teeth was rotten. Once the tooth was pulled, Tim felt fine. 
 Counterfactual Context: He had a swollen gum and infection.
Solution:
His dentist took a look in his mouth. One of the teeth would need to be removed as a result of the infection. Once the tooth was pulled, the infection lessened and Tim felt fine. 