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: 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.

Ex Output:
b

Ex Input:
Title: John goes to the store.. Sentence 1: John went to the store. Sentence 2: John wanted to buy tomatoes. Sentence 3: He looked everywhere for the tomatoes. Sentence 4: The store was sold out of fresh tomatoes. Choices: a. Kathie was treated for a mild concussion. b. John was sad, and went to another store.

Ex Output:
a

Ex Input:
Title: The Elevator. Sentence 1: The family was stuck. Sentence 2: The elevator they were on had stopped moving! Sentence 3: They pushed the emergency button. Sentence 4: Some firemen came to rescue them. Choices: a. Bernice stood up for herself saying, leave my feet alone, I mean it! b. They were so happy to be out of the elevator!

Ex Output:
a