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: 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.
Example Output: b

Example Input: Title: Trade. Sentence 1: They were sold out of medium shirts. Sentence 2: All that was left was larges. Sentence 3: My friend wanted to trade with me. Sentence 4: She is smaller than me. Choices: a. My friend came to pick me up. b. So I traded with her.
Example Output: a

Example Input: Title: Messy Garage. Sentence 1: Rob was pretty bored. Sentence 2: So he tried of think of something to do. Sentence 3: He remembered he had an old RC plane his old garage. Sentence 4: So he spent hours and hours searching through his dirty garage. Choices: a. I was so exhausted however, that I feel asleep again. b. But after hours of breathing in dust and dirt, Rob never found it.
Example Output:
a