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: Laura entered a walking competition. Sentence 2: She had to walk fifteen miles every week, but it was worth it! Sentence 3: On the last day of the week Laura had to walk 10 miles. Sentence 4: She procrastinated so much but finally walked that 10 miles. Sentence 5: Laura went to sleep proud of herself that night. Choices: a. Kayaking. b. Laura's Competition.

b