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: All Greg's friends called him Grimey. Sentence 2: Greg hated being called Grimey. Sentence 3: He asked them why they kept calling him that. Sentence 4: His friends laughed and said it was because he hated it so much. Sentence 5: So Greg made up mean nicknames for all of them. Choices: a. Grimey. b. Zoom.

a