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: Lily has two white mice, Zeus and Zeke. Sentence 2: Zeus and Zeke are brothers. Sentence 3: Suddenly, Zeus and Zeke didn't get along anymore. Sentence 4: Lily was forced to separate Zeus and Zeke. Sentence 5: Zeus and Zeke now live in their own, personal cages. Choices: a. Dust. b. Lily And The Mice.

b