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: Since Elana moved back home, she and her sister have shared a bed. Sentence 2: They're both very tall adults and the bed is just full-sized. Sentence 3: When the weather warms, they find it hard to both sleep at once. Sentence 4: Eventually they settle on two shifts, morning and night. Sentence 5: Elana sleeps during the day, but they always have breakfast together. Choices: a. Shifts. b. Red Towel.

a