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: Our dog was very playful. Sentence 2: We tried to find a dog friend for her. Sentence 3: She was so playful that it upset other dogs. Sentence 4: We finally found a compatible dog. Sentence 5: We adopted her and had two fun dogs. Choices: a. Losing the game. b. A friend.

b