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: Gary was mowing his lawn. Sentence 2: The mower didn't seem to be cutting well. Sentence 3: Gary went to a home improvement store. Sentence 4: He bought a new set of blades for the mower. Sentence 5: Gary changed the blades on his mower. Choices: a. New Blades. b. Tile.

a