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: Jim tried to lose weight. Sentence 2: So he decided to fast. Sentence 3: It ended up being easier than he thought. Sentence 4: And he fasted for 10 days. Sentence 5: But afterwards, he over ate, gaining back all of his weight. Choices: a. Race. b. Fast.

b