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.

Ex Input:
Title: Murder Mystery. Sentence 1: We went to a dinner and show one night. Sentence 2: There was a murder mystery on stage. Sentence 3: Someone was killed, and we had to solve the murder. Sentence 4: It was very entertaining. Choices: a. He is getting extra exercise. b. My son guessed the murderer correctly, and our meal was free.

Ex Output:
b

Ex Input:
Title: Static Cling. Sentence 1: Charlotte was at work. Sentence 2: She had done laundry earlier in the day. Sentence 3: When she did the laundry, she didn't notice a sock stuck to her pants. Sentence 4: A sock fell out of her pants as she walked. Choices: a. Charlotte's co-workers laughed at her. b. Randy beats James by 20 points.

Ex Output:
a

Ex Input:
Title: Karen's lost blender. Sentence 1: Karen could not find her blender anywhere. Sentence 2: Karen looked in the pantry. Sentence 3: It was not there. Sentence 4: She looked over at the counter. Choices: a. Tom ended up saving a ton of money! b. The blender was already sitting on the counter.

Ex Output:
b