Instructions: Given a premise, an initial context, an original ending, and a new ending, the task is to generate the counterfactual context that is aligned with the new ending. 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. The original ending is the last three sentences of the story. Also, you are given a new ending that can provide the new story with the same premise. You should write a counterfactual context to explain the small differences between the original and new endings. More specifically, a story context contains the general plot of the story. And a counterfactual context is a slight modification to the initial context. To sum up, you should write the second sentence of a story based on the premise(first sentence) and the new ending(last three sentences) of the story.
Input: Premise: Ann took her dog for a walk. 
 Initial Context: Suddenly, her dog started to bark at a bush. 
 Original Ending: Ann peeked into the bush to see what he was barking at. She was shocked to find a box with newborn kitten in it. Ann took the kittens to the vet to make sure they were healthy. 
 New ending: Ann looked at her house to see why the dog ran home. She was shocked to find a box with newborn kitten on her porch. Ann took the kittens to the vet to make sure they were healthy. 
Output:
Suddenly, her dog ran back to the house.