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: Tom was trying to quit smoking. Sentence 2: He bought some nicotine gum as an alternative. Sentence 3: Tom noticed that the nicotine gum was helping. Sentence 4: After a month, Tom no longer chews the nicotine gum. Sentence 5: Tom is now completely tobacco-free. Choices: a. Surprises. b. Smoking.

b