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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.

Example Input: Title: Dreams. Sentence 1: I had a dream last night. Sentence 2: It was very disturbing. Sentence 3: My son climbed a door and rolled over the top. Sentence 4: He fell to the ground below. Choices: a. Joe was happy to spend time with his friend. b. He laid there unable to move.
Example Output: a

Example Input: Title: The Bee Sting. Sentence 1: Two dogs, Thor and Zeus, were playing outside. Sentence 2: Zeus kept coming to the door barking. Sentence 3: When April opened the door he walked away waiting for her to follow. Sentence 4: She followed him to Thor, who's face was swollen. Choices: a. She took him to the vet and found out he ate a bee. b. She ended up getting pencil all over her new dress!
Example Output: b

Example Input: Title: Poison Ivy. Sentence 1: Katie went hiking in the woods. Sentence 2: She went off the designated trail. Sentence 3: Her skin brushed against many plants. Sentence 4: Later she became very itchy. Choices: a. As soon as Henry found out, he tried to look for the buyer. b. She realized she had walked through poison ivy.
Example Output:
a