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: Larry was trying to finish his book report before school. Sentence 2: He wasn't done writing when the bus drove up. Sentence 3: On the bus he continued working and didn't talk to his friends. Sentence 4: With some difficulty he was even writing while walking up to the door. Sentence 5: He put down the last period just as he entered the classroom. Choices: a. Waste of an Hour. b. Book report.

b