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 woke with a stiff neck and backache each day. Sentence 2: He decided to splurge on a pricey memory foam pillow. Sentence 3: The first night, he slept much better. Sentence 4: He woke with no soreness at all! Sentence 5: Joe was glad he's bought the fancy new pillow! Choices: a. Pillow. b. Whale.

a