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: Mark is an athlete that competes in Track and Field. Sentence 2: He has a practice session where he practices his jumps. Sentence 3: He was running late and decided to practice without warming up. Sentence 4: When he jumped the first hurdle, he got a cramp. Sentence 5: He decided to never train without warming up. Choices: a. Elliptical. b. Mistake.
Example Output: b

Example Input: Sentence 1: My daughter was struggling with her math class. Sentence 2: She brought some difficult homework home. Sentence 3: We both worked on it for several hours. Sentence 4: She began to understand the material. Sentence 5: She got a good grade on her assignment. Choices: a. Math homework. b. Bad parking.
Example Output: a

Example Input: Sentence 1: The girl was redecorating her kitchen. Sentence 2: She found the perfect rug. Sentence 3: She measured carefully and then ordered it. Sentence 4: When it arrived, it looked totally different. Sentence 5: The girl was so disappointed! Choices: a. Lucky girl. b. The Rug.
Example Output:
b