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 lips were bleeding. Sentence 2: I was at school. Sentence 3: I had on a coat. Sentence 4: A kid zipper up my zipper. Sentence 5: My lip was stuck in the zipper. Choices: a. Lips. b. Cold.

a