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: It's been getting really cold lately. Sentence 2: Aeris keeps this in mind while getting ready to walk her dog. Sentence 3: She first put a warm dog sweater on her dog. Sentence 4: Then she puts socks and a scarf on her. Sentence 5: The two of them happily and warmly went for a walk. Choices: a. Bundle of Fur. b. A day in the park.

a