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: Tim played a game on his computer. Sentence 2: He got a high score. Sentence 3: He showed his high score to his brother. Sentence 4: His brother beat his high score in one try. Sentence 5: Tim was unable to beat his brother's new high score. Choices: a. High Score. b. Gold Ring.
Output:
a