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: Andy was always good with gardening. Sentence 2: Andy decided he would add cucumbers to his garden. Sentence 3: Andy purchased the seeds, and went to his garden to plant them. Sentence 4: Andy found the perfect spot for the cucumbers, and began planting. Sentence 5: Andy was happy his garden was flourishing because of his green thumb. Choices: a. Green Thumb. b. Walk.

a