You will be given a definition of a task first, then some input of the task.
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'.

Sentence 1: Kevin had a button missing from his shirt. Sentence 2: He used a safety pin to keep his shirt closed. Sentence 3: Kevin showed his wife when he got home. Sentence 4: Kevin's wife mended the shirt. Sentence 5: Kevin was able to wear the shirt without pins. Choices: a. Twin Brothers. b. Mending the Shirt.
Output:
b