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: Blank Keycaps. Sentence 1: I purchased a high-end mechanical keyboard. Sentence 2: I thought it would be good for writing and for gaming. Sentence 3: I also ordered a nice set of blank keycaps for the board. Sentence 4: The caps made it difficult for me to type on the board. Choices: a. I ended up putting back on the stock caps, and loving the board. b. They stood up and left.

Ex Output:
a

Ex Input:
Title: Food Recommendations. Sentence 1: Oliver was eating with some friends. Sentence 2: His friends had never eaten at the restaurant before. Sentence 3: Oliver recommended some items to them. Sentence 4: His friends ordered some of the items. Choices: a. They enjoyed the food Oliver recommended. b. So Susie then stopped talking to her.

Ex Output:
a

Ex Input:
Title: Tattoo. Sentence 1: Mark got a tattoo on his leg. Sentence 2: When he got older he didn't like the tattoo. Sentence 3: He hired an artist to make it into a picture of a bear. Sentence 4: The artist worked on his leg for four hours. Choices: a. She went back home to sleep. b. Mark had that tattoo for two years before he regretted it.

Ex Output:
b