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: Mike was a bad kid who loved to make other children cry. Sentence 2: He often teased the overweight kids and called them mean names. Sentence 3: His mom often warned him that what goes around comes around. Sentence 4: He didn't listen and picked on kids all the way up to high school. Sentence 5: He found himself a victim as the kids he bullied were now bullying him. Choices: a. Mean Mike. b. Middle school hardships.
Output:
a