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: 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.

Ex Output:
b

Ex Input:
Title: Dance Class. Sentence 1: Natalie was going to her first dance class. Sentence 2: She had dreamed about this day for years! Sentence 3: Her teacher invited her to put on her ballet shoes. Sentence 4: Natalie couldn't wait to learn how to dance! Choices: a. She was going to work hard to do a great job in the recital. b. But her boss congratulated her as she had found the quips funny.

Ex Output:
b

Ex Input:
Title: Very delayed flight. Sentence 1: Allie was supposed to have a flight to London. Sentence 2: The flight was supposed to leave at noon. Sentence 3: But she found out it was delayed until tomorrow from the weather. Sentence 4: Allie could not believe it. Choices: a. She couldn't afford a hotel so she had to stay at the airport. b. Tom decided next time he would go where he wanted.

Ex Output:
b