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: Nick's Truck. Sentence 1: Nick loved his pickup truck. Sentence 2: One night he went outside to find that someone had spray painted it. Sentence 3: He called all his friends to find out who did it. Sentence 4: The he realized it happened on the anniversary of his breakup. Choices: a. Ricky found the missing keys. b. He called the girl and she admitted that she had done it.
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: Ash the shy guy. Sentence 1: Ash was shy guy ever since he was a young child. Sentence 2: He was especially scared of talking to girls even his cousins. Sentence 3: One day he got the courage to ask his crush out on a date, she agreed. Sentence 4: They later went to the movies and had a great time, she gave a hug. Choices: a. She told him the reason she agreed was because he was shy, b. Soon Joe was in prison right beside his brother.
Example Output:
a