Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Premise: Little Sarah wanted to bake a dozen chocolate chip cookies. 
 Initial Context: Little Sarah pulled up a recipe after doing a Google search. 
 Original Ending: Little Sarah gathered all the ingredients in her kitchen. Little Sarah mixed all the ingredients according to the recipe. Little Sarah baked one dozen chocolate chip cookies. 
 New ending: Little Sarah gathered all the ingredients in her kitchen. Little Sarah mixed all the ingredients according to the recipe. Little Sarah baked one dozen sugar cookies. 
Student:
Little Sarah didn't have chocolate chips, so she made sugar cookies instead.