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 was mailing letters one evening. Sentence 2: There were a lot of letters to mail and a lot of envelopes. Sentence 3: When I licked one envelope, it gave my tongue a paper cut. Sentence 4: I yelled out in pain from the paper cut. Sentence 5: I then went to the kitchen and got a wet sponge for the envelopes. Choices: a. Paper Cut. b. Cara's Sister.

a