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.

Example Input: Title: Knitting Scarves. Sentence 1: Joey's fourth grade class was knitting scarfs for the homeless. Sentence 2: His teacher showed them how to do it and provided wool. Sentence 3: He wasn't excited about knitting but was glad to help homeless people. Sentence 4: Much to his surprise he found he liked to knit. Choices: a. That night at home he knitted two more scarves to donate. b. Rob realized his goal was too unrealistic.
Example Output: b

Example Input: Title: Scout and the Neighbors. Sentence 1: Scout was a tiny puppy who loved to meet new people. Sentence 2: She loved her next door neighbors most of all. Sentence 3: On a walk one day she slipped out of her collar to go see them. Sentence 4: The house was empty, but the garage was open. Choices: a. She ran inside, and Norm gave her a big smile and plenty of pats. b. The teachers loved his idea because the trees would last forever.
Example Output: b

Example Input: Title: Stubborn Illness. Sentence 1: Martha had been bedridden with stomach pain for several days. Sentence 2: She was stubborn, but eventually let her husband take her to the ER. Sentence 3: At the emergency room, a doctor diagnosed her with gallstones. Sentence 4: They had to operate to remove her gallbladder. Choices: a. Now she has recovered, except that she can't eat certain foods. b. He was barely able to get enough to pay his medical bills.
Example Output:
b