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: Toad. Sentence 1: Anna found a big toad in the road outside her house. Sentence 2: She carried it inside and asked her mom to keep it. Sentence 3: But her mom explained that the toad would be happier outside. Sentence 4: Anna thought it over and decided her mom was right. Choices: a. She went back outside and let the toad hop away, free. b. She happily chatted for an hour.

Ex Output:
a

Ex Input:
Title: Pinata. Sentence 1: At morgan's birthday party, we set up a pinata. Sentence 2: The first girl to swing does not break the pinata. Sentence 3: The next boy hits one of the legs off the pinata. Sentence 4: Morgan takes one big swing and the pinata explodes. Choices: a. All the kids collect their chocolaty goodies. b. He thought that he might visit there again someday.

Ex Output:
a

Ex Input:
Title: Basketball.. Sentence 1: Jack was going to try out for basketball for his school. Sentence 2: He wasn't sure if he would make it so he asked me for help. Sentence 3: I am very good at basketball so I gave him some tips. Sentence 4: He was very nervous still but more confident. Choices: a. When he tried out the coach told him no and he was sad. b. The parents were thankful they'd found a great caretaker.

Ex Output:
a