Definition: 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'.
Input: Sentence 1: Dan decided he wanted to lose 40 pounds over the Summer. Sentence 2: Dan watched his diet very carefully. Sentence 3: Dan jogged every evening. Sentence 4: Dan felt himself getting more lean with each passing week. Sentence 5: Dan lost 43 pounds that Summer! Choices: a. Flu. b. Losing It.

b