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: Food Recommendations. Sentence 1: Oliver was eating with some friends. Sentence 2: His friends had never eaten at the restaurant before. Sentence 3: Oliver recommended some items to them. Sentence 4: His friends ordered some of the items. Choices: a. They enjoyed the food Oliver recommended. b. So Susie then stopped talking to her.
Example Output: a

Example Input: Title: Cheap Thrills. Sentence 1: Sia didn't have any cash. Sentence 2: Her boyfriend had come over earlier. Sentence 3: They danced all through her house. Sentence 4: Sia was very happy. Choices: a. His car engine is blown up! b. She decided it was okay she didn't have money to go out.
Example Output: b

Example Input: Title: Tutor. Sentence 1: Keith was a smart student and loved to volunteer. Sentence 2: He spent many hours tutoring other students that struggled. Sentence 3: Keith's teachers recognized how much he helped others. Sentence 4: They nominated Keith for a school-wide award. Choices: a. Keith won and was recognized by the principal for his work. b. Jack decided to never tour again.
Example Output:
a

