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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.

Ex Input:
Title: Justin's Cats. Sentence 1: Justin always wanted to own a black cat. Sentence 2: He didn't want to adopt one until he settled down. Sentence 3: He saw a beautiful black cat in a pet store one day. Sentence 4: After a lot of thought, he decided to buy it. Choices: a. Now he can't imagine what life would be like without him. b. Abby was mad that she would have to replace the roof on her house.

Ex Output:
b

Ex Input:
Title: Julie Rides Her Bike. Sentence 1: Julie knows it will become hot later today. Sentence 2: She decides to go for a bike ride early in the morning. Sentence 3: She has a nice ride through the park. Sentence 4: The temperature is still cool by the time she gets home. Choices: a. Carmen is happy she found a way to be more active. b. Julie is glad she rode her bike before the weather became hot.

Ex Output:
a

Ex Input:
Title: Black Mark. Sentence 1: My wife drove home from work the other day. Sentence 2: She said she put the windshield wiper on for a minute. Sentence 3: The wiper left a big black mark on the windshield. Sentence 4: She got some Windex and sprayed the windshield. Choices: a. She was able to erase the mark. b. We invited her into our apartment to wait.

Ex Output:
b