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: Nina was very proud of her new bike. Sentence 2: She went everywhere with it to show it off to people. Sentence 3: She dinged her belly and smiled. Sentence 4: And people smiled and wave. Sentence 5: Until someone stole her bike and she had to walk on foot again. Choices: a. Bike pride. b. Frowning.

a