TASK DEFINITION: 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.
PROBLEM: Premise: Jennifer and Siri are best friends.
Initial Context: Tonight they are having a sleepover.
Original Ending: They thought it would be fun to see how much soda they could drink. They stayed up all night drinking soda and eating junk. The next morning they had terrible stomach aches.
Counterfactual Context: Tonight they are going to the movies together.

SOLUTION: They thought it would be fun to see how much popcorn they could eat. They spent the whole movie drinking soda and eating popcorn. The next morning they had terrible stomach aches.

PROBLEM: Premise: Olivia hated karaoke.
Initial Context: Her crush invited her to go this friday.
Original Ending: It was a company tradition. She said yes. As soon as she got there she turned around and went home.
Counterfactual Context: Her crush hated karaoke, too.

SOLUTION: It was a company tradition. She said yes to her crush avoiding karaoke. As soon she went by the karaoke she turned around and went home.

PROBLEM: Premise: Mari was about to move.
Initial Context: She was packing up and needed to check a little used closet.
Original Ending: She opened it and saw some horrible trash inside. She remembered that she had stuck a bag in there, long ago. It was so bad that she decided to just leave it.
Counterfactual Context: She had just locked up her old house for the last time.

SOLUTION:
She opened the door to the new house and saw some horrible trash inside. She didn't know who had stuck a bag in there. It was so bad that she decided to call someone to help her.