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: The man lit a cigarette. Sentence 2: He inhaled the smoke deeply. Sentence 3: He coughed from the smoke. Sentence 4: He put out the cigarette. Sentence 5: He threw the cigarette in the trash. Choices: a. Smoke. b. Cigarette.

b