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: Torn Bill. Sentence 1: John had a twenty dollar bill. Sentence 2: Unfortunately it ripped in half. Sentence 3: John tried to tape it and spend it. Sentence 4: Most places didn't take it. Choices: a. The local bank swapped it for a new one, though. b. The toy broke the vacuum cleaner.
Example Output: b

Example Input: Title: The Paint Can. Sentence 1: Ross bought a new house. Sentence 2: He bought some paint for the living room. Sentence 3: He was walking through the house in the dark when he kicked something. Sentence 4: It was the paint can. Choices: a. Paint spilled all over the carpet. b. Jane felt relief that the person was not dangerous.
Example Output: b

Example Input: Title: The Locker. Sentence 1: Keith had just started at a new school. Sentence 2: He was assigned a locker. Sentence 3: Keith couldn't get his new locker open. Sentence 4: He kept trying his old combination. Choices: a. Eve was furious at her husband. b. Keith had to get the janitor to open his locker.
Example Output:
a