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: Tutelage. Sentence 1: Tony realized that he needed to learn to learn to cook. Sentence 2: He was confused as to where he started. Sentence 3: It dawned on him to ask his mother for help. Sentence 4: He invited her over to teach him. Choices: a. The team began to win again. b. She cooked for him but gave him knowledge on the basics along the way.
Example Output: b

Example Input: Title: Murder Mystery. Sentence 1: We went to a dinner and show one night. Sentence 2: There was a murder mystery on stage. Sentence 3: Someone was killed, and we had to solve the murder. Sentence 4: It was very entertaining. Choices: a. He is getting extra exercise. b. My son guessed the murderer correctly, and our meal was free.
Example Output: b

Example Input: Title: Long Race. Sentence 1: Tom was playing during lunch. Sentence 2: His friends all wanted to race. Sentence 3: They decided to go around the school and back. Sentence 4: Tom thought it was too long. Choices: a. He was right, most barely made it. b. He no longer let him play with his phone.
Example Output:
a