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.

Input: Consider Input: Title: Vent. Sentence 1: Bob heard a knocking sound from the vent. Sentence 2: He peered inside to see what was the matter with it. Sentence 3: Looking back at him was the biggest moth he'd ever seen! Sentence 4: Bob got the fly swatter and swung it like a bat. Choices: a. The moth was smashed into a flat bloody splat! b. By the end of the day, Alfred knew ten new Chinese words.

Output: b

Input: Consider Input: Title: Adoption. Sentence 1: Shelly and Mark wanted a baby. Sentence 2: Unfortunately, Shelly couldn't get pregnant. Sentence 3: A friend suggested an adoption agency. Sentence 4: They signed up with the agency and went through the program. Choices: a. They now have a baby girl. b. He was disappointed with the experience.

Output: b

Input: Consider Input: Title: Tim's Deep Journey. Sentence 1: A man named Tim wanted to learn meditation. Sentence 2: Tim bought a plane ticket to the Himalayan Mountains. Sentence 3: A week later Tim took a trip to the Himalayan Mountains, Sentence 4: While there, Tim met an expert monk who taught him meditation. Choices: a. Finally the day came and Ian had an incredible time! b. Tim now spends most of his days meditating.
Output: a