You will be given a definition of a task first, then some input of the task.
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.

Title: Painting Lines. Sentence 1: Abby was painting the center line on the highway. Sentence 2: He started daydreaming. Sentence 3: He looked back to see that the line was crooked. Sentence 4: He went back and painted over the line with black. Choices: a. They spent the day floating, relaxing, and having a good time. b. He got home three hours late from that mistake.
Output:
a