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'.

Example Input: Sentence 1: The employees were mad at management. Sentence 2: They organized a walkout. Sentence 3: Management closed the store for the day. Sentence 4: The next day there were new employees. Sentence 5: The old employees were fired. Choices: a. Cousin. b. walk out.
Example Output: b

Example Input: Sentence 1: Ella had left her car unlocked. Sentence 2: She had left her purse in the car. Sentence 3: Her purse was missing when she returned to the car. Sentence 4: Ella realized someone had stolen her purse. Sentence 5: Ella always locked her car after this. Choices: a. Doctor. b. The Unlocked Door.
Example Output: b

Example Input: Sentence 1: There once was a runner who was great at his sport. Sentence 2: He could outrun everyone. Sentence 3: However, his son grew up to be almost as fast as him. Sentence 4: When he finally raced his son, he cheated to win. Sentence 5: He felt awful in the end. Choices: a. Budgeting. b. The Athlete.
Example Output:
b