In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.

Ex Input:
Sentence 1: I waited near my class before 10 minutes before it started. Sentence 2: When I placed my water bottle in my bag, the cap fell loose. Sentence 3: Some water soaked my lab notebook and other papers. Sentence 4: I quickly took it out. Sentence 5: Since my lab notebook was ruined, I had to throw it away. Choices: a. Breaking up. b. Bad Luck in an Instant.

Ex Output:
b

Ex Input:
Sentence 1: The bird sat in the tree early that morning. Sentence 2: It began to feel rather alone. Sentence 3: It started cawing loudly from the branch. Sentence 4: No other birds appeared in the tree. Sentence 5: The bird simply sang, waking everyone in the neighborhood. Choices: a. Wondering. b. Caw.

Ex Output:
b

Ex Input:
Sentence 1: Our cat, Smudge, had a swollen face. Sentence 2: We took Smudge to the vet to find out what was wrong. Sentence 3: The vet looked in Smudge's mouth. Sentence 4: He found that he had a broken tooth. Sentence 5: Smudge had to have an operation to remove the broken tooth. Choices: a. Metal in a Microwave. b. Smudge goes to the vet.

Ex Output:
b