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: Vera wept as she held the shredded flesh of her dog in her arms. 
 Initial Context: A semi had raced up her quiet street and ran over him. 
 Original Ending: He hadn't even stopped, when he'd seen what he'd done. Vera put together a funeral fit for a person for her dog. She buried him under the peaceful branches of the silver birches. 
 Counterfactual Context: Another dog had attack her beloved pet.
Student:
The other dog hadn't even stopped, when he'd seen how badly he'd mauled Vera's dog. Vera put together a funeral fit for a person for her dog. She buried him under the peaceful branches of the silver birches. 