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: Tony went to unlock his shed. Sentence 2: He couldn't find the key. Sentence 3: Tony got an axe from his garage. Sentence 4: He knocked the lock off the shed door. Sentence 5: Tony had to buy a new lock for the door.

The Lock on the Door