Task: Story Composition
Input (English): Premise: Roku was a bad chess player. 
 Initial Context: He lost almost every game. 
 Original Ending: Roku decided to study chess and become better. Eventually he started to win more games. After a few decades he became a chess grandmaster. 
 Counterfactual Context: He decided to try checkers instead.
Output (English): Roku decided to study checkers and become better. Eventually he started to win more games. After a few decades he became a checkers master.