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.

Example Input: Title: Nick's Truck. Sentence 1: Nick loved his pickup truck. Sentence 2: One night he went outside to find that someone had spray painted it. Sentence 3: He called all his friends to find out who did it. Sentence 4: The he realized it happened on the anniversary of his breakup. Choices: a. Ricky found the missing keys. b. He called the girl and she admitted that she had done it.
Example Output: b

Example Input: Title: The Dinosaur. Sentence 1: Frank loved science toys. Sentence 2: His dinosaur figures were his favorite. Sentence 3: He would make elaborate stories with them. Sentence 4: He played with them for hours until his mom took them away. Choices: a. Josh had a concussion. b. He went to bed right away so he could wake up and play more.
Example Output: b

Example Input: Title: Choices. Sentence 1: Kate was only 15 when she found out that she was pregnant. Sentence 2: She was single and had no idea how to mother, but she vowed to learn. Sentence 3: She kept her baby and tried hard to get her GED while working nights. Sentence 4: As her child grew, Kate saw that her sacrifices were all worth it. Choices: a. She had a diploma and a happy, smart, healthy son! b. Lucky for her it was not as bad as she thought.
Example Output:
a