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: Music Practice. Sentence 1: Laura was trying to figure out how to play a song. Sentence 2: She had the notes down, but the rhythm was tricky. Sentence 3: She went through each measure slowly on her trombone. Sentence 4: She penciled notes onto her sheet music to help her remember. Choices: a. Tomorrow, she'd have the song ready. b. The car flips several times and Burt gets badly injured.

Ex Output:
a

Ex Input:
Title: Star Gazing. Sentence 1: On a clear summer night Traci likes to look at the stars. Sentence 2: Since the time she was a little girl she has been mesmerized by them. Sentence 3: Her favorite constellation is the Big Dipper. Sentence 4: She also loves the Aurora Borealis. Choices: a. The forum got taken down. b. If it's a clear night you know just where she can be found!

Ex Output:
b

Ex Input:
Title: Jennifer buys pizza. Sentence 1: Jennifer was so hungry. Sentence 2: She had been out running errands all day. Sentence 3: She decided to get a pizza. Sentence 4: Jennifer took the pizza home. Choices: a. She enjoyed it with her family. b. She was freaked out but decided to just go with it.

Ex Output:
a