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 noticed a stray cat. Sentence 2: He thought it might be friendly. Sentence 3: Tom tried to go up and pet it. Sentence 4: The cat scratched at him. Sentence 5: Tom left it alone. Choices: a. Helper. b. Angry Cat.

b