Given the task definition and input, reply with output. 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.

Premise: Ed and Emma were twins and wanted to have matching Halloween costumes. 
 Initial Context: But they couldn't agree on a costume! 
 Original Ending: Ed wanted to be a superhero and Emma wanted to be a mermaid. Then their mom said she could make costumes that'd please them both. Oh Halloween she have them matching costumes - Aquaman costumes! 
 New ending: Ed wanted to be a superhero and Emma wanted to be a mermaid. Then their mom said she could make costumes that'd please them both. Oh Halloween she have them matching costumes - Aquaman costumes! 

But they couldn't agree on a costume that's why they decided to wear different costumes.