You will be given a definition of a task first, then some input of the task.
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: Sally had several dogs. 
 Initial Context: One of them named Fido was a real pain. 
 Original Ending: He would always bite people and try to pounce on them. Then one day Fido met a large Great Dane. Fido doesn't mess with things larger than he is anymore. 
 Counterfactual Context: One of them named Fido was a real sweetheart.
Output:
He would always lick people and try to snuggle next to them. Then one day Fido met a large Great Dane. Fido became best friends with the large dog. 