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: John was singing Rihanna's latest song at the top of his lungs. Sentence 2: Suddenly the water went frigid. Sentence 3: John screamed out, wondering what went wrong. Sentence 4: Through the bathroom door, John heard his roommate's laughter. Sentence 5: Within moments the hot water returned and John laughed at the prank. Choices: a. Shower Prank. b. The Chair.

a