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 seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

Example Input: Title: Scared. Sentence 1: I wrote a book called Angel Investor but was scared to sell it. Sentence 2: Other writers told me don't sell it but I needed the money. Sentence 3: I asked some professional writers What Should I Do? Sentence 4: Those professional writers said Go For It. Choices: a. She wanted the music box to be on display. b. I placed my ebook on AMAZON DOT COM and now it's a bestseller.
Example Output: b

Example Input: Title: The Math Problem. Sentence 1: The teacher looked out over the class and Joey slid down in his seat. Sentence 2: One finger pointed in his direction and Joey slid from his desk. Sentence 3: He stared up at the jumble of numbers on the chalkboard. Sentence 4: He wrote an answer on the board and hurried to his desk. Choices: a. Many customers were very happy when seeing the product. b. After the teacher said the answer was right, Joey smiled.
Example Output: b

Example Input: Title: Used Car. Sentence 1: Oscar was saving money for a new car. Sentence 2: But he was becoming impatient. Sentence 3: He ended up buying a used car that he didn't want. Sentence 4: And he felt regretful every time he drove it. Choices: a. Oscar sold the used car and attempted to save his money again. b. The plumber fixed the pipe but it cost over 500 dollars.
Example Output:
a