You will be given a definition of a task first, then some input of the task.
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'.

Sentence 1: I got a stomach virus last week. Sentence 2: I couldn't eat and didn't feel well. Sentence 3: I stayed on the couch most of the day. Sentence 4: The next day I felt much better. Sentence 5: Now my Mom has the stomach virus! Choices: a. Shirts. b. Stomach Virus.
Output:
b