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: My dog has gained some extra weight. Sentence 2: I've been trying to take him for a walk every day. Sentence 3: He's too small to walk for long. Sentence 4: I end up having to carry him home. Sentence 5: At least I'll lose some weight. Choices: a. Heart Beat. b. A walk.

Ex Output:
b

Ex Input:
Sentence 1: Melissa decided to make something she'd never made before. Sentence 2: She found a recipe for meatloaf. Sentence 3: Melissa mixed the ingredients and put it in a pan. Sentence 4: She popped it in the oven and waited. Sentence 5: She couldn't wait to eat it! Choices: a. Meatloaf. b. First time babysitting.

Ex Output:
a

Ex Input:
Sentence 1: Tim had his phone in class. Sentence 2: He forgot to put it on silent. Sentence 3: A friend kept trying to text him. Sentence 4: Tim was caught fiddling with it. Sentence 5: The teacher took it away for the day. Choices: a. Loud Messages. b. Testicular Cancer.

Ex Output:
a