You will be given a definition of a task first, then some input of the task.
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'.

Sentence 1: Herman was a bicycle racer. Sentence 2: He kept his bike in tip-top condition. Sentence 3: On the day of a race the bike lost a vital piece. Sentence 4: Herman knew it was sabotage. Sentence 5: He repaired the bike himself and won the race anyway. Choices: a. Bicycle Racing. b. Knife Tricks.
Output:
a