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: Rocky is a boxer. Sentence 2: He fights in a bunch of matches and reaches the top. Sentence 3: He finally gets a shot at the title. Sentence 4: He trains day and night to prepare for the fight. Sentence 5: Rocky wins the fight and becomes the champion. Choices: a. Rocky's big fight. b. Stepping on a Cat.

a