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: Allie wanted a lipstick set. Sentence 2: There was a particular one she wanted. Sentence 3: But it was all sold out online. Sentence 4: So she got it off eBay instead. Sentence 5: Unfortunately she had to pay ten times the cost. Choices: a. Lipstick set. b. Walking into the door.

a