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.

Premise: Cam ran across the beach and dove into the ocean. 
 Initial Context: The cool water felt good to him as he swam. 
 Original Ending: When Cam was neck deep in water he felt something on his leg. A jellyfish had stung Cam! He winced in pain and slowly Came swam back ashore. 
 Counterfactual Context: He quickly swam back to shore.
When Cam was neck deep in water he felt something on his leg. A jellyfish had stung Cam! He winced in pain and slowly Came swam back ashore. 