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.

Input: Consider Input: Title: The Big Gift. Sentence 1: Jane wanted a power wheels for christmas. Sentence 2: Her parents told her they couldn't afford one. Sentence 3: Jane understood and wasn't too upset. Sentence 4: Christmas morning she noticed a big box by the tree. Choices: a. The trip ended during a stunning sunset. b. Jane's parents surprised her with the gift she wanted.

Output: a

Input: Consider Input: Title: Bicycle. Sentence 1: Nina's car broke down one morning. Sentence 2: She was unsure of how to get to work. Sentence 3: She went into her garage, hoping to find something to help. Sentence 4: There she discovered her old, unused bicycle. Choices: a. She decided to ride the bike to work instead. b. K was upset that her father was so miserly, and did not go.

Output: b

Input: Consider Input: Title: Vaccinations. Sentence 1: The pharmacy at my store gives free vaccinations to insured employees. Sentence 2: I signed up for four different inoculations. Sentence 3: I received two shots in my left arm on one day. Sentence 4: I had the other two shots in the right arm on the next day. Choices: a. The apple fell and hit him on the head. b. Both of my arms were sore for a week.
Output: a