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: I went to the store yesterday. Sentence 2: I was looking for chocolate. Sentence 3: Luckily I found some. Sentence 4: It was on sale. Sentence 5: I was able to get it half off. Choices: a. Lucy's Pie. b. Chocolate on sale.

b