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: Bill's buddy Marty invited him to a sleep over. Sentence 2: Bill and Marty stayed up all night watching horror movies and talking. Sentence 3: They finally fell asleep around 4 in the morning. Sentence 4: The boys slept until noon. Sentence 5: The next day Bill went home and thought about how fun it all was. Choices: a. Tomato. b. Boys Sleepover.

b