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: Billy's freezer was getting old. Sentence 2: He went to get something out of it one day. Sentence 3: All the food had defrosted. Sentence 4: The freezer had stopped running. Sentence 5: Billy started saving up for a new freezer. Choices: a. Petra's Travels. b. The Freezer.

b