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: Efficient Holiday. Sentence 1: Kyle and Kim went to Madrid for a holiday. Sentence 2: They went with only each other to maximise their time. Sentence 3: This was because they didn't enjoy the dynamics of a big group. Sentence 4: People would always end up losing out because of others' choices. Choices: a. This time, they did everything they wanted to do with time to spare. b. Jason lived the rest of his life in a little town in Mexico.
Example Output: a

Example Input: Title: Puppy Please. Sentence 1: Jason lived at home and brought home a new puppy to his parents house. Sentence 2: He begged his parents to let him keep it. Sentence 3: His parents agreed as long as he made sure it didn't pee in the house. Sentence 4: The dog ended up peeing on the carpet that very same day. Choices: a. His parents ended up making him take the dog back to where he got it. b. Sam suffered for years with her.
Example Output: a

Example Input: Title: The Necklace. Sentence 1: Laura had a birthday. Sentence 2: Her husband handed her a present. Sentence 3: It was a beautiful diamond necklace! Sentence 4: Laura put it on immediately. Choices: a. She couldn't wait to show it off to everyone! b. It was delicious!
Example Output:
a