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: 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.

Ex Output:
b

Ex Input:
Title: Family. Sentence 1: Sarah's mom was visiting from Florida. Sentence 2: They went to Sarah's favorite restaurant. Sentence 3: They talked for hours without realizing the time. Sentence 4: They had talked passed closing time! Choices: a. Sarah tipped the waitress generously. b. They were both better off for the storm coming in.

Ex Output:
a

Ex Input:
Title: First day of school. Sentence 1: Allie was nervous for the first day of school. Sentence 2: She was afraid she would make no friends. Sentence 3: Luckily when she got there, some nice girls came up to her. Sentence 4: The girls complemented Allie and asked her to play. Choices: a. Jenny was so happy that she signed up for the next recital. b. Allie was happy to make some friends.

Ex Output:
b