Instructions: 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: Cathy thought it was a good idea for her son to learn the piano. Sentence 2: Her son was a goof ball with no interest in the piano. Sentence 3: Cathy still forced him to take the lessons. Sentence 4: His teacher became so frustrated she threw a music book at him. Sentence 5: Cathy learned you can't force someone to do something. Choices: a. playing the piano. b. Jennifer's first day.
Output:
a