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: Jon loved to spend every summer at the beach with his grandparents. 
 Initial Context: This summer was special in that he was able to take surfing lessons. 
 Original Ending: On his first trip out on the water, his instructor spotted a shark. Quickly, they ran out of the water, but not before the shark attacked. It took a bite out of the surfboard, but noone was hurt. 
 Counterfactual Context: It was a lakehouse.
Output:
On his first trip out on the water on a raft, they noticed an alligator. Quickly, they ran out of the water, but not before the alligator attacked. It took a bite out of the raft , but no one was hurt. 