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: Ryan took the customer's order. Sentence 2: He gave the order to his cook. Sentence 3: The cook made the order quickly. Sentence 4: Ryan delivered the order quickly. Sentence 5: Ryan got a big tip. Choices: a. High Score. b. Big Tip.

b