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: Greg bought some new shoes. Sentence 2: He wasn't sure if he liked them. Sentence 3: They were very uncomfortable. Sentence 4: He decided to take them back. Sentence 5: Greg swapped them out for another pair. Choices: a. Small Belt. b. New Shoes.

b