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'.

Ex Input:
Sentence 1: Arni opened a restaurant with his son. Sentence 2: He taught his son to make the best pasta in the state. Sentence 3: They advertised all over for their grand opening. Sentence 4: Hundreds of people ate there that day. Sentence 5: Their restaurant will be open for years. Choices: a. Arni's Restaurant. b. First Day.

Ex Output:
a

Ex 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.

Ex Output:
b

Ex Input:
Sentence 1: Damien was constantly arguing with people. Sentence 2: His parents encouraged him to join the debate team. Sentence 3: Debate formalized and legitimized Damien's combative spirit. Sentence 4: Damien later attended law school. Sentence 5: His proclivity for argumentation served him well. Choices: a. Experiment. b. Lawyer.

Ex Output:
b