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: The man brushed the horse. Sentence 2: The horse liked to be brushed. Sentence 3: It would normally stand very still to be brushed. Sentence 4: The man hit a sore spot on the horse. Sentence 5: The horse reared it's head in pain. Choices: a. Horse. b. Lost Mind.

a