You will be given a definition of a task first, then some input of the task.
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.

Title: Salty Cake. Sentence 1: Helen decided to bake a cake for the birthday of her husband Paul. Sentence 2: She put a dough into the oven. Sentence 3: After the cake was baked, they started to eat. Sentence 4: After first bite they found out she used salt instead of sugar. Choices: a. My friend will never let me live it down. b. They both laughed.
Output:
b