Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Premise: Jerry grabbed his surfboard and swam into the ocean. 
 Initial Context: He saw a great looking wave and swam over to surf it. 
 Original Ending: Just as he prepared to climb his board, he saw a giant shark. Jerry quickly climbed his board and tried to escape the shark. Then last minute, Jerry realized the shark was just a dolphin. 
 Counterfactual Context: He saw that the ocean was too calm to surf today.
Student:
Just as he prepared to swim instead, he saw a giant shark. Jerry quickly returned to the beach to escape the shark. Then, from shore, Jerry realized the shark was just a dolphin. 