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: Skating away. Sentence 1: Lucy wanted to skate. Sentence 2: She hadn't done it before. Sentence 3: She decided to take lessons. Sentence 4: On her first lesson she fell. Choices: a. It would be away until she got good. b. Andrew is very happy that he decided to join the cross-country team.

Ex Output:
a

Ex Input:
Title: Koala. Sentence 1: Ky wanted a koala for a pet. Sentence 2: She begged her parents incessantly. Sentence 3: But they had to tell her that koalas made bad pets! Sentence 4: Ky was sad, but finally she understood. Choices: a. Soon she decided on a dog instead! b. Evan was fully dressed.

Ex Output:
a

Ex Input:
Title: Cramp. Sentence 1: I was doing a pool workout. Sentence 2: My calf froze up for a minute. Sentence 3: It was as it flexed itself. Sentence 4: I rubbed it. Choices: a. She taught me how to pick with my fingers. b. Then I continued the workout.

Ex Output:
b