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: Disappointing friends. Sentence 1: Gary didn't like to go to bars much. Sentence 2: He didn't drink a lot, so he would always over do it when he did. Sentence 3: For his birthday, his friends took him to a bar. Sentence 4: He was very disappointed, as his friends knew he didn't like them. Choices: a. She ended up with second place. b. Gary then realised that he needed to find new friends.

Ex Output:
a

Ex Input:
Title: Weak. Sentence 1: Rick's friends asked him to go bowling. Sentence 2: But he was reluctant because he was so weak. Sentence 3: He decided to go anyway and had a lot of fun. Sentence 4: But he noticed a slight pain in his back. Choices: a. And after he picked up another bowling ball, it became worse. b. He woke up feeling refreshed for work the next day.

Ex Output:
b

Ex Input:
Title: Relationships. Sentence 1: Tom loved his girlfriend. Sentence 2: Tom found out his girlfriend was leaving him for another man. Sentence 3: Tom cried furiously. Sentence 4: Tom felt ill to his stomach. Choices: a. Tom was sad after his girlfriend ended the relationship. b. His father sent him to art school.

Ex Output:
b