In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

Ex Input:
Title: Melissa is heartbroken. Sentence 1: Melissa has been dating a boy for 3 months. Sentence 2: One day the boy tells Melissa he wants to break up. Sentence 3: He tells her he has found someone new. Sentence 4: Melissa asks who the girl is. Choices: a. The boy tells her he's in love with Melissa's sister. b. Patrick's wife was surprised he noticed.

Ex Output:
a

Ex Input:
Title: The System Check. Sentence 1: Marvin called a repairman to his house. Sentence 2: His air conditioner seemed to be struggling. Sentence 3: It was almost 80 degrees in his house. Sentence 4: The repairman replaced a part. Choices: a. He watched them until they were out of sight. b. By that evening, the house was a cool 72 degrees.

Ex Output:
b

Ex Input:
Title: Stacy's House. Sentence 1: Stacy moved away from her hometown after finishing high school. Sentence 2: After she left, her parents also moved away. Sentence 3: However, her parents had a hard time selling their old house. Sentence 4: Stacy decided to spend the next summer at home to fix up the house. Choices: a. Tom smiled said thanks and put the wallet in his front pocket. b. Because of this, the house sold within the next year.

Ex Output:
b