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: Driving. Sentence 1: Susan was afraid to drive because she had never done it before. Sentence 2: She asked a friend to give her lessons. Sentence 3: Susan's friend drove her all over town the next day. Sentence 4: Susan felt more comfortable after the lesson. Choices: a. Susan decided to go take the test to get her driver's license. b. Tom made more money than ever before.
Example Output: a

Example Input: Title: Find your Niche. Sentence 1: Maryann was made fun of in school for her looks. Sentence 2: She was tall, thin, and multiracial. Sentence 3: After she graduated high school, she moved to California. Sentence 4: She was signed to a modeling agency. Choices: a. Catherine felt better already. b. Now those same kids from school try to be her friend online.
Example Output: b

Example Input: Title: Dave's Costume. Sentence 1: Suzanne had a Halloween party. Sentence 2: She asked all of her guests to come in costume. Sentence 3: She said that a prize would be given for the best costume. Sentence 4: A boy named Dave came dressed as a girl. Choices: a. His costume was so convincing he won first prize in the contest. b. With one yank she tore her hair free.
Example Output:
a