You will be given a definition of a task first, then some input of the task.
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: I like to play 3 minute speed chess online. 
 Initial Context: Sometimes this lets me beat better players by speed. 
 Original Ending: I recently practiced an obscure opening, the Bird. It is not well known, and makes the opponent take time. So far I have beaten two players who ar 300 points better. 
 New ending: I recently practiced an obscure opening, the Bird It is a move that makes the opponent work quicly. Unfortunately it mean I lost to two players who were 300 points worse 
Output:
Sometimes this lets me excited by speed.