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: Dry. Sentence 1: The water flowed downhill. Sentence 2: One summer the weather was very dry. Sentence 3: The water stopped flowing near the top of the source. Sentence 4: The farmers near the source kept all the water. Choices: a. Ken wound up losing an easy race. b. The farmers farther away could not make enough food.
Example Output: b

Example Input: Title: Airplane ride. Sentence 1: Today I rode on an airplane. Sentence 2: I was traveling from Orlando, FL to Washington, DC. Sentence 3: We hit bad turbulence while in the air. Sentence 4: It scared me. Choices: a. I'm glad to be safely on the ground and for the trip to be over. b. When she got the test she left it blank because it was too hard.
Example Output: a

Example Input: Title: New Forum. Sentence 1: The forum changed suddenly one day. Sentence 2: I didn't expect it when I logged in. Sentence 3: Everyone suddenly decided to leave, and posted saying so. Sentence 4: We followed to the new forum. Choices: a. He said he did, but it did not work. b. All the drama was finally over so we could work.
Example Output:
b