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: Katie was filthy. Sentence 2: She filled the bathtub with water. Sentence 3: She climbed in and smiled. Sentence 4: The hot water felt so good! Sentence 5: Katie sat in the hot water for an hour. Choices: a. The Bathtub. b. The Ice Storm.

a