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: Anna's hair was very dry. Sentence 2: She bought a leave-in conditioner. Sentence 3: She started using it every week. Sentence 4: Soon she noticed a difference. Sentence 5: Her hair was much healthier! Choices: a. Drunk. b. Dry.
Output:
b