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: Casey bought a new golden retriever puppy. Sentence 2: His puppy had a lot of accidents in the house. Sentence 3: Casey had to go outside with him every 15 minutes. Sentence 4: He worked very hard to train him. Sentence 5: After a few weeks of training, he had no more accidents. Choices: a. Casey's Puppy. b. Morning coffee.

a