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: All About a Boy. Sentence 1: Rachael and Kristy were best friends. Sentence 2: Rachael was dating a boy named Mark. Sentence 3: Mark broke up with Rachel for no reason. Sentence 4: The next week Mark and Kristy started dating. Choices: a. Impatient Agnes ended up waiting much longer than ten minutes. b. Rachael and Kristy are no longer best friends.
Example Output: b

Example Input: Title: Flexibility. Sentence 1: Tom was very inflexible. Sentence 2: He wanted to increase his flexibility. Sentence 3: He began a consistent stretching and exercise program. Sentence 4: He saw his flexibility increase. Choices: a. She redesigned her whole line removing all animal testing. b. He was happy about increasing his flexibility.
Example Output: b

Example Input: Title: Alive again. Sentence 1: Lionel had been depressed for fifteen years. Sentence 2: So when he woke up one morning feeling happy, he was surprised. Sentence 3: He checked his body for symptoms. Sentence 4: But he felt fine as if a cloud had moved away. Choices: a. He took a big breath happy to finally enjoy life again. b. He pulled out a fat catfish from the water as his dad smiled on.
Example Output:
a