Given the task definition and input, reply with output. 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'.

Sentence 1: Sal talked about all his coworkers behind their backs. Sentence 2: When Marie got married, she didn't invite Sal. Sentence 3: All the other coworkers were there. Sentence 4: They loved having a night out without Sal's negativity. Sentence 5: Sal couldn't understand why he'd not been invited. Choices: a. Clueless Sal. b. Too Strong.
a