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 Moon. Sentence 1: The family was out for a moonlit stroll. Sentence 2: The moon was high in the sky and so bright! Sentence 3: They stopped to admire it. Sentence 4: Some clouds moved in and covered the moon. Choices: a. His parents cried many tears of joy at his graduation. b. It suddenly got very dark.
Example Output: a

Example Input: Title: Learning a Lesson. Sentence 1: On a bright day, Mike looked at the sun. Sentence 2: His eyes began to hurt immediately. Sentence 3: He thought why this might happen. Sentence 4: Instead, he looked to the sides of the bright sun. Choices: a. No one could remember what else he had done. b. Now, he could enjoy the light while staying safe.
Example Output: a

Example Input: Title: A New Request. Sentence 1: Robert begged his parents for a dog. Sentence 2: They bought him one. Sentence 3: He played with the dog for only two weeks. Sentence 4: Robert now wanted a cat. Choices: a. His parents insisted he focus on taking care of his new dog. b. Now my stomach is satisfied and my fridge is full.
Example Output:
b