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: My wife had a retirement party on September 3. Sentence 2: She invited an ex coworker, Mary. Sentence 3: Mary said she would come, but did not show. Sentence 4: Mary later texted saying she had gone out drinking the day before. Sentence 5: She did not get up until the party was over. Choices: a. Hangover. b. The Wingman.

a