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: The concrete workers had been working all day. 
 Initial Context: They redid the sidewalk in front of Ava's house. 
 Original Ending: The smoothed it out perfectly. Then, a little girl came running by. She left a footprint in the perfectly smooth sidewalk. 
 Counterfactual Context: They redid the sidewalk in front of Ava's house and there will never be a footprint on the sidewalk.
Output:
They smoothed it out perfectly. Then, a little girl came running by. She tried to leave a footprint in the perfectly smooth sidewalk but there were barriers. 