Definition: 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: Nancy was swimming in the ocean. 
 Initial Context: She saw a large fin rise from the water. 
 Original Ending: She got scared and tried to swim as fast as she can to the shore. Jenny had to help her get up since she had breathing problems. Terry rose from the water, with the toy fin on his head. 
 Counterfactual Context: She saw a large fin rise from the water and it was a real shark.
Output:
She got scared and tried to swim as fast as she can to the shore. Jenny had to help her get up since she had breathing problems. Terry rose from the water and ran. 