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.

Input: Consider Input: Title: Expensive Dresses. Sentence 1: Juliet was shopping for her prom. Sentence 2: She had gathered a few of her favorite dressed. Sentence 3: Secretly she knew which one she really wanted. Sentence 4: It was extremely pricey though, so she begged her mom. Choices: a. Luckily her mom decided that it would be okay and bought it. b. The next year she ran at Nationals.

Output: a

Input: Consider Input: Title: Rollerskating. Sentence 1: Debora went to a roller rink. Sentence 2: She had never been roller skating before. Sentence 3: She was bad at staying on her feet and kept falling. Sentence 4: On one of her falls she sprained her ankle. Choices: a. She swore she would never go roller skating again. b. Sabrina had wasted all her money on lottery tickets.

Output: a

Input: Consider Input: Title: Lead Filter. Sentence 1: Tommy lived in a century-old apartment building. Sentence 2: One day he read a news story about lead paint and pipes in old homes. Sentence 3: Tommy became worried about his long term health. Sentence 4: He invited an assessor to check his paint, and it was fine. Choices: a. Her dad laughed at her. b. Tommy bought lead water filters for all of his faucets, just in case.
Output: b