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 lived in a hot weather climate. Sentence 2: Tom disliked sweating. Sentence 3: One day his home's air conditioner stopped working. Sentence 4: He called a repairman. Sentence 5: The repair-man fixed Tom's air conditioning unit. Choices: a. Hair. b. Air Conditioner.

b