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: A middle-aged man went to the park for some relaxation. Sentence 2: He walked to the top of a large hill and looked at the scenery. Sentence 3: When he decided to leave, the man had a thought. Sentence 4: Instead of walking down, he decide to roll down the hill. Sentence 5: The man felt young again as he rolled down. Choices: a. Kiss. b. Rediscovered youth.

b