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: Rats. Sentence 1: There were a lot of rats in my house. Sentence 2: I went to the store to buy traps to get rid of them. Sentence 3: I bought a lot of traps that day, but I didn't buy enough. Sentence 4: I used all the traps but there are still a lot of rats in my house. Choices: a. Gordon will never learn. b. I'll have to buy some more tomorrow.
Example Output: b

Example Input: Title: Bad Idea. Sentence 1: Tommy poured gas into a balloon and inflated it with helium. Sentence 2: He wanted his friend to video him as he put a lit match to it. Sentence 3: Tommy's friend thought that was a very stupid idea. Sentence 4: Not listening, Tommy struck a match and held it to the balloon. Choices: a. Engulfed in flames, Tommy fell to the ground. b. I found him in the basement and wiped deodorant all over his face.
Example Output: a

Example Input: Title: Learning To Swim. Sentence 1: Olga had been afraid of the water all of her life. Sentence 2: When her grandchildren began to learn to swim she felt it was time. Sentence 3: Olga took lessons at the community center. Sentence 4: Once she got over the fear she picked up the skill rapidly. Choices: a. Heather called her daughter and told her she did not have to drive her. b. Olga surprised her grandchildren by jumping in the pool last week.
Example Output:
b