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: Ben and his son went to play laser tag one day. Sentence 2: His son Tommy was only eleven, so Ben thought he'd win easily. Sentence 3: But Tommy surprised him with deadly aim and speed! Sentence 4: At the end of the day, there was no doubt about the winner. Sentence 5: Ben had to concede that Tommy had won fair and square! Choices: a. Cheater. b. Laser Tag.
Output:
b