Definition: In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.
Input: Sentence 1: Joe found a wallet in the men's bathroom at school. Sentence 2: He saw the ID and returned it to the boy. Sentence 3: The boy was so grateful! Sentence 4: He offered Joe $5 for returning it. Sentence 5: But Joe refused - he was just happy to do a good deed. Choices: a. Wallet. b. War Hero.

a