Definition: 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: Roger invited his brother to play a game of chess. Sentence 2: His brother was reluctant, but eventually accepted. Sentence 3: They set up the board between them. Sentence 4: Roger easily defeated his brother in the game. Sentence 5: He then realized why his brother had been so reluctant before. Choices: a. Skip gets lucky. b. Chess.

b