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.

Ex Input:
Title: The Crush. Sentence 1: Justin had a crush on Kate from the moment he saw her at school. Sentence 2: Kate always smiled and said hello, but Justin could only blush. Sentence 3: At the school dance, Justin saw Kate sitting quietly by herself. Sentence 4: Summoning every bit of his courage, Justin asked her to dance. Choices: a. Kate said yes. b. After that they played some duets with teacher.

Ex Output:
a

Ex Input:
Title: Lack of Movement. Sentence 1: Tim was in a car accident. Sentence 2: He broke his hip and several other bones. Sentence 3: Tim wasn't able to move around a lot. Sentence 4: Tim began to gain weight from lack of exercise. Choices: a. Now none may stand against the stairmaster. b. Tim had to go to physical training to start moving again.

Ex Output:
b

Ex Input:
Title: The Skeleton. Sentence 1: Kelly loved Halloween. Sentence 2: She found a fake skeleton to put in her yard. Sentence 3: All the kids in the neighborhood were scared of it. Sentence 4: They would dare each other to touch it. Choices: a. Kelly liked watching the kids creep by it. b. Mae could not stop smiling and her parents were happy.

Ex Output:
a