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.

Example Input: Title: The Tent. Sentence 1: The family decided to camp out in the backyard. Sentence 2: They spent an hour setting up the tent. Sentence 3: When it was up, they put their sleeping bags inside. Sentence 4: It immediately started to rain. Choices: a. He arrived home exhausted and decided to practice gear-shifting. b. The family decided to run back inside.
Example Output: b

Example Input: Title: Sisterly Love. Sentence 1: Sheila was diagnosed with breast cancer six months ago. Sentence 2: After learning that she couldn't have surgery she started chemo. Sentence 3: Her sister Sharon takes her to all her appointments. Sentence 4: Last week Sheila learned the cancer had moved to her lungs. Choices: a. They thought this idea was just crazy! b. Sheila and Sharon both cried for a long time.
Example Output: b

Example Input: Title: Amicable Divorce. Sentence 1: Gary was sad that he was divorcing his wife. Sentence 2: However, Gary knew his wife was in love with someone else. Sentence 3: At the proceedings, Gary and his ex wife agreed on things amicably. Sentence 4: After the proceedings, Gary wished his ex wife the best, and left. Choices: a. Gary was sad, but glad they could resolve things amicably. b. He returns home to tell his friends of the vacation.
Example Output:
a