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: Going Home. Sentence 1: The long weekend was almost over. Sentence 2: It was time to go home. Sentence 3: Tim, May, and their parents packed up their camping supplies. Sentence 4: Tim and May had so much fun over the last few days. Choices: a. Although they were sad to go home, they knew they'd return in spring. b. The reds, oranges, yellows and pinks were beautiful in the sky.

Ex Output:
a

Ex Input:
Title: Bad tooth. Sentence 1: Nolan had a bad tooth. Sentence 2: But he refused to go to the dentist. Sentence 3: As the pain was getting more intense every day, he had no choice. Sentence 4: He called for an emergency appointment. Choices: a. When the tooth was out, Nolan was grateful to be pain-free. b. The bad news is they don't have a single dress above a size 5.

Ex Output:
a

Ex Input:
Title: The Cheap Flight. Sentence 1: Tony was trying to travel to his brother's wedding. Sentence 2: He couldn't afford most tickets so he booked something cheap. Sentence 3: He arrived for his flight bracing himself for the worst. Sentence 4: The flight was long, dirty and uncomfortable. Choices: a. She now is one of the top ranked players in the world. b. Still in the end at least he managed to travel safely to his destinati.

Ex Output:
b