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: My nails were always short and very brittle. Sentence 2: They were covered in tiny lines. Sentence 3: Because of this, polish wouldn't stay put. Sentence 4: I bought a small fine sanding paper. Sentence 5: After sanding down my nails, they were shiny and pretty. Choices: a. Summer job. b. Nails.

b