Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Premise: Clara bought a cactus sapling from a store. 
 Initial Context: She planted it in her yard. 
 Original Ending: For many Years the cactus did not grow. However, after 20 Years the cactus had grown quite large. It now stands watch in Clara's front yard. 
 Counterfactual Context: She kept it on her kitchen counter.
Student:
For many Years the cactus did not grow. However, after 20 Years the cactus had grown quite large. Clara had to plant it in her front yard. 