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: Walt worked at his workbench. Sentence 2: He sat on a tall stool. Sentence 3: After many hours, the stool hurt his back. Sentence 4: He traded it for an orthopedic chair. Sentence 5: It felt much better soon! Choices: a. Swim Team. b. The Stool.

b