Detailed Instructions: In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.
See one example below:
Problem: Title: Marcus Buys Khakis. Sentence 1: Marcus needed clothing for a business casual event. Sentence 2: All of his clothes were either too formal or too casual. Sentence 3: He decided to buy a pair of khakis. Sentence 4: The pair he bought fit him perfectly.
Solution: Marcus was happy to have the right clothes for the event.
Explanation: Marcus is buying clothes for a business event.

Problem: Title: Chin. Sentence 1: David's chin was hurting a lot. Sentence 2: It hurt so much, he could not bend it. Sentence 3: After twenty minutes, David went to the hospital. Sentence 4: The doctor stated that his chin was bruised.
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
After a couple of weeks, David's chin stopped hurting.