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: Hiking. Sentence 1: Eric was planning to go solo hiking today. Sentence 2: He packed snacks and a lot of water the night before. Sentence 3: In the morning he headed out very early because the drive was long. Sentence 4: He gets there and there was already a ton of people. Choices: a. He ends up meeting a friend there and they hike together. b. I filled it up before I returned it so it would not happen to her too.

Ex Output:
a

Ex Input:
Title: Slugger. Sentence 1: Mark was never a good baseball player. Sentence 2: He practiced everyday with his dad. Sentence 3: No matter how much he tried, he never got better. Sentence 4: He went to his Saturday baseball game feeling hopeless. Choices: a. When it was his turn to bat, he knocked it out of the park! b. Mary screamed and ran inside the warm house.

Ex Output:
a

Ex Input:
Title: Mean boy. Sentence 1: Blake was the meanest kid in school. Sentence 2: So one day all the kids ganged up together to talk to him. Sentence 3: As he was alone, Blake had to listen. Sentence 4: But as soon as they were gone, he was ready to retaliate. Choices: a. The next day he picked each kid individually to bully them one by one. b. She tried to catch it but it was gone.

Ex Output:
a