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: Running. Sentence 1: Rick decided that he wanted to start running. Sentence 2: He started off by walking every other day. Sentence 3: Before he got serious he order new running shoes. Sentence 4: Soon he started using a heart rate monitor to improve his training. Choices: a. After that, Amy was able to eat with syrup. b. Within a couple of months Rick ran a race with a bunch of friends.

Ex Output:
b

Ex Input:
Title: Car. Sentence 1: Ryan saw ads on TV that offered new cars at low prices. Sentence 2: He thought he could easily afford a $200 monthly payment. Sentence 3: But when he got to the dealership, he was surprised. Sentence 4: That price was only for people with perfect credit, apparently. Choices: a. Ryan's payment would be more than double the advertised price! b. They required Judith to take speech therapy.

Ex Output:
a

Ex Input:
Title: Recycled Cans. Sentence 1: Tom had a big party. Sentence 2: There were tons of aluminum cans left over. Sentence 3: Tom picked them all up. Sentence 4: He took them to be recycled. Choices: a. Tom made a decent amount of money. b. Aya had missed a large chunk of eggshell, and it had cut her husband!

Ex Output:
a