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: Kitty Rescue. Sentence 1: Allison heard a meow from outside of her bedroom window. Sentence 2: Outside, she finds a kitten stuck in a tree. Sentence 3: Allison calls her neighbor, Tom, to help get the cat. Sentence 4: Tom uses his dad's ladder to climb up and rescue the kitten. Choices: a. He told Ian it wasn't aliens but only foreign spies with hand radios. b. Allison decides to keep the kitten.
Example Output: b

Example Input: Title: The Halloween Party. Sentence 1: Susan was invited to a Halloween party. Sentence 2: She planned her costume for weeks. Sentence 3: The day of the party, Susan donned her costume. Sentence 4: Everyone loved Susan's costume. Choices: a. Susan won first place in the costume contest. b. From then on Tom didn't stuff himself as much.
Example Output: a

Example Input: Title: Squirrels Ate Lisa's Pumpkins. Sentence 1: Lisa set out two pumpkins on her front steps. Sentence 2: She went to work and returned home seven hours later. Sentence 3: Lisa found the pumpkins destroyed on the front lawn. Sentence 4: Lisa then reviewed the home's video security footage. Choices: a. Instantly she felt better. b. The video footage shows squirrels eating the two pumpkins.
Example Output:
b