Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Jake and his girlfriend shared everything with each other. Sentence 2: The only thing Jake didn't know was what was inside a little box. Sentence 3: Jake's girlfriend kept the box locked under the bed. Sentence 4: She wouldn't tell Jake what was in it. Sentence 5: One day Jake picked the lock to find a surprise watch for him.

Secret Box