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: Anna was trying to reach a box of baking soda. Sentence 2: Unfortunately, it was on the top shelf. Sentence 3: She pulled out the kitchen stool and took a step. Sentence 4: The stool wobbled under her as she reached for the box. Sentence 5: She successfully got the baking soda without incident. Choices: a. The biggest sand castle. b. Stool.
Output:
b