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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.

Ex Input:
Title: Running Out of Gas. Sentence 1: Liz's fuel gauge was broken. Sentence 2: She didn't realize it at the time. Sentence 3: It wasn't until her car stopped on the side of the road. Sentence 4: The mechanic told her the problem. Choices: a. She had it fixed within a week. b. He bought it and received it within days.

Ex Output:
b

Ex Input:
Title: Unknown Friend. Sentence 1: Tom got a friend request on Facebook. Sentence 2: He couldn't figure out who it was. Sentence 3: Tom decided to message them. Sentence 4: They talked to a bit before Tom figured it out. Choices: a. It was an advertising bot. b. However, it stained the table pink.

Ex Output:
b

Ex Input:
Title: Dragonfly. Sentence 1: Ashley hated dragon flys a lot. Sentence 2: In fact, she hated anything that was small and flew. Sentence 3: One day, Ashley was forced to go outside. Sentence 4: Then, Ashley suddenly saw a dragonfly. Choices: a. Billy blushed and then ran to find the girl who left the note. b. At first, she was scared but then, she fought her fears and won.

Ex Output:
a