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 walking down an old road. Sentence 2: He saw many large potholes. Sentence 3: Tom would step over them. Sentence 4: Tom viewed it as a game. Sentence 5: Tom became very good and avoiding holes in the road. Choices: a. Bat Cave. b. Walking.

b