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: Thirst. Sentence 1: John was very thirsty. Sentence 2: He asked his friend to buy him drinks. Sentence 3: He paid his friend five dollars to go to the store. Sentence 4: His friend got the drinks for John. Choices: a. John quenched his thirst. b. When he learned the details, though, he commended Nina for her choice!

Ex Output:
b

Ex Input:
Title: Router for Sister-in-Law. Sentence 1: My sister-in-law lives alone. Sentence 2: She used to plug her internet cable into her laptop. Sentence 3: Last month she bought a router. Sentence 4: I had trouble installing my router, but installed hers easily. Choices: a. They all wound up being fake. b. Now she brings her laptop into her bedroom.

Ex Output:
a

Ex Input:
Title: Sign Language. Sentence 1: Martha decided to teach her baby basic sign language. Sentence 2: Martha repeated the sign for milk with her hands every day. Sentence 3: When Martha's baby was eight months old, he signed back to her! Sentence 4: Martha was so excited her baby learned to sign milk. Choices: a. Her baby was so excited because he got extra milk. b. Kara heard sirens from the fire truck approaching her house.

Ex Output:
b