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: Green had always wanted these blue headphones. Sentence 2: The only issue was they were very expensive. Sentence 3: Green did not have a lot of money. Sentence 4: She mowed lawns and slowly got cash. Sentence 5: One day, she was able to buy the headphones. Choices: a. Phone. b. Headphones.

b