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: Runner. Sentence 1: Joey got into shape to get ready for the marathon. Sentence 2: He worked hard and jogged a couple miles every day. Sentence 3: After a few months, he was at his fittest. Sentence 4: Joey ran in the marathon. Choices: a. Stan smiled and reassured her to keep the money. b. He didn't win, but he was happy he finished.

Ex Output:
b

Ex Input:
Title: Science Project. Sentence 1: Jon had worked very hard at his science project. Sentence 2: Jon brought it to the science fair and set up a booth for all to see. Sentence 3: Jon's project was very popular and received many visitors. Sentence 4: Jon answered many people's questions regarding his amazing project. Choices: a. They called the police right away. b. Jon was very happy to win the blue ribbon for his science project!

Ex Output:
b

Ex Input:
Title: Weight control. Sentence 1: Norman was too fat to be healthy. Sentence 2: He felt so heavy, he could barely get out of bed to start his day. Sentence 3: To help himself, he started eating healthy food and exercised a lot. Sentence 4: After a whole month, he felt a good difference. Choices: a. Poppy felt silly but was happy that she had met her idol. b. Encouraged by his progress, he continued until he became slim.

Ex Output:
b