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: Rachel wanted to attend the movies with her friend Greg. Sentence 2: He promised to go with her last weekend. Sentence 3: Greg failed to show up at the movies. Sentence 4: Worried that something bad had happened Rachel phoned him. Sentence 5: Turns out Greg had driven to the wrong movie theater. Choices: a. Flat Tire. b. Rachel.
Output:
b