Detailed Instructions: 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.
Q: Premise: Henry wanted a cell phone for Christmas, nothing else. 
 Initial Context: On Christmas morning there was only one box left to open. 
 Original Ending: It was too big to be a phone. But when he opened it, there was a phone inside. His parents had used a big box so he couldn't guess what was inside. 
 Counterfactual Context: On Christmas morning there was only an envelope left to open.
A:
It was too small to be a phone. When he opened it, there was a coupon for a phone inside. His parents had used an envelope so he couldn't guess what was inside. 