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: Pool Safety. Sentence 1: Sandy and Ron had just bought a new house. Sentence 2: There was a pool in the backyard. Sentence 3: The couple had a young son. Sentence 4: They were concerned about their child's safety. Choices: a. Sandy and Ron enrolled their son in swimming lessons. b. He went home and played video games the rest of the night.

Ex Output:
b

Ex Input:
Title: The Way Home. Sentence 1: Steve was walking home with a group of friends. Sentence 2: Ted started talking loudly to a boy on the side of the road. Sentence 3: Steve noticed the boy was crying, made worse by Ted's taunts. Sentence 4: Steve asked the boy if he was lost. Choices: a. Arthur now wears a reflective vest when riding at night. b. Steve invited the boy to play with them as he showed him the way home.

Ex Output:
a

Ex Input:
Title: Salad. Sentence 1: Emma had never had a Caesar salad. Sentence 2: When her dinner party hostess served it, she tried to handle it. Sentence 3: She told herself that it would taste okay, and she tasted it. Sentence 4: To her surprise, she was surprised by its taste. Choices: a. It was strong, but good - and Emma loved it! b. Joe learned a lot about respecting different cultures!

Ex Output:
b