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: One day a very unfit man decided to get fit and run a marathon. Sentence 2: He trained hard for many months and made slow progress. Sentence 3: He hired a trainer to help him and his progress sped up. Sentence 4: Months passed and eventually he was fit and ready. Sentence 5: He ran the marathon and came in third place! Choices: a. The runner. b. Autumn Days.
Output:
a