Instructions: 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.
Input: Premise: Frank is working on an ad blocking extension for Chrome. 
 Initial Context: Development has been pretty tough lately. 
 Original Ending: He had to work for days to get around tricks used by advertisers. Frank's extension is coming along nicely, though. It's the best ad blocker I've ever used. 
 Counterfactual Context: Development has been easy and quick lately.
Output:
He had to employ rudimentary tactics to get around the usual advertisers. Frank's extention was completed very quickly. It's the best ad blocker I've ever used. 