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.

Ex Input:
Title: Tennis. Sentence 1: Jan was playing tennis. Sentence 2: She was about to hit the ball when she missed. Sentence 3: However, the missed ball hit her in the head. Sentence 4: Jan thought she was okay but got dizzy. Choices: a. The doctor diagnosed Jan with a slight concussion. b. Joy had never been so embarrassed and luckily got a warning.

Ex Output:
b

Ex Input:
Title: Fight. Sentence 1: Out two year old granddaughter Sheila is in a day care. Sentence 2: Sheila is a very intelligent, but tough child. Sentence 3: One day another child took Sheila's milk. Sentence 4: Sheila hit the child on her head. Choices: a. The mosquitoes bite her much less after taking B1. b. Sheila's teacher had a talk with her about hitting others.

Ex Output:
a

Ex Input:
Title: Big Birthday. Sentence 1: Jessica wanted to do something big for her 30th birthday. Sentence 2: She thought maybe she would go skydiving. Sentence 3: She talked to some of her friends and they all agreed to go. Sentence 4: Jessica bought the tickets and met up with her friends. Choices: a. They went to a local shop and stayed until it stopped raining. b. They all went skydiving and had a great time.

Ex Output:
a