Task: Story Composition
Input (English): Premise: Billy has been running around excited all morning. 
 Initial Context: He hadn't slept a wink last night. 
 Original Ending: He bounced up and down in the car the entire way there. He was finally going to meet santa. As they met the elves, he recited to himself the list one last time. 
 Counterfactual Context: He slept really well that night.
Output (English): He had bounced up and down in the car the entire way there. He was finally going to meet Santa. As they met the elves, he recited to himself the list one last time.