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: Tom was losing his hair. Sentence 2: He cared about his appearance. Sentence 3: He visited a doctor. Sentence 4: He had hair implants put in. Sentence 5: Tom felt better about his appearance. Choices: a. Party. b. Hair.

b