Definition: 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: Title: Swollen. Sentence 1: I sat at the computer all day long. Sentence 2: I was unaware of my own discomfort. Sentence 3: When I stood up, I suddenly realized how stiff my legs were. Sentence 4: I looked down and saw my feet were severely swollen. Choices: a. I decided to go for a walk to relieve the pain and swelling instead. b. He said that she wasn't his real mother.
Output:
a