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: The river. Sentence 1: Kelly went boating on the wild river. Sentence 2: She forgot to take her favorite glasses off before boarding the boat! Sentence 3: Halfway down the river she hit a rough patch and the boat was shaken. Sentence 4: Her favorite glasses fell from her head into the deep, wild water. Choices: a. She learned her lesson, to never wear glasses while boating again! b. There was no rat, only a hairy, rotten potato.
Example Output: b

Example Input: Title: History Class. Sentence 1: Kenny was having trouble in his history class. Sentence 2: His teacher offered him an extra points assignment. Sentence 3: Kenny did the extra points assignment. Sentence 4: While doing the assignment, he became more interested in the subject. Choices: a. Kim was evicted from her apartment. b. Kenny slowly began to do better in history class.
Example Output: a

Example Input: Title: Bananas. Sentence 1: Kevin needed some bananas. Sentence 2: He went too the store. Sentence 3: Got some bananas. Sentence 4: He took them home. Choices: a. Enjoyed himself one. b. The yard was nice and clean.
Example Output:
b