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: Anna was excited about her first day of kindergarten. Sentence 2: Her friend who lived next door was going to the same school. Sentence 3: They decided to walk to school together on that first day. Sentence 4: While walking they discovered they had the same teacher. Sentence 5: When they arrived at their class, they chose to sit by each other. Choices: a. Depression. b. Kindergarten.

b