Given the task definition and input, reply with output. 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'.

Sentence 1: Bobby gained a lot of weight over the winter. Sentence 2: He went on a diet in the spring. Sentence 3: He lost the weight he had gained. Sentence 4: He felt good about his body. Sentence 5: He didn't gain any weight the next winter. Choices: a. Damariscotta. b. Too Heavy.
b