Instructions: 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: Fred wanted to get more exercise. Sentence 2: So he decided to walk to his local grocery store instead of drive. Sentence 3: But he couldn't believe how tiring it was to carry groceries. Sentence 4: And he ended up calling a cab. Sentence 5: Fred tried to set better exercise goals the next time. Choices: a. Smoking Patches. b. Long Walk.
Output:
b