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: I wanted to stop drinking caffeine. Sentence 2: I decided to go cold turkey. Sentence 3: The next morning I skipped coffee. Sentence 4: By afternoon I had a horrible headache. Sentence 5: I desperately drank a huge mug of soda. Choices: a. A blunt skates. b. Headache.

b