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: Smoothie. Sentence 1: Tim valued his health very much. Sentence 2: For his meals he would frequently prepare smoothies. Sentence 3: He carefully sourced the healthiest ingredients. Sentence 4: He loved his smoothies. Choices: a. Sarah broke up with John. b. He felt better after consuming them.

Ex Output:
b

Ex Input:
Title: Lighter. Sentence 1: Bob wanted to smoke a cigarette. Sentence 2: However, he forgot his lighter. Sentence 3: He went to his friend and asked for one. Sentence 4: His friend said he doesn't have one. Choices: a. It ended up sliding down all the time. b. Bob knows his friend has one however.

Ex Output:
b

Ex Input:
Title: Surprise Party. Sentence 1: Jane loved her boyfriend. Sentence 2: His birthday was coming up. Sentence 3: She decided to throw him a surprise party. Sentence 4: Jane's boyfriend had no idea. Choices: a. Her sister absolutely loved it. b. He was very happily surprised.

Ex Output:
b