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: Alyssa liked to work as a waitress, but she had one bad client. Sentence 2: He never gave her a tip and was always rude to her. Sentence 3: To teach him a lesson, she brought his tea cold one day. Sentence 4: He complained and said he would never come back. Sentence 5: Alyssa smiled and went back to the kitchen. Choices: a. Bad costumer. b. Unfair.

a