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: I remember when we celebrated my 18th birthday it was so fun. Sentence 2: I invited all my friends and they all attended. Sentence 3: As i enter the stage i feel so beautiful and stunning. Sentence 4: They made me feel that it was my big day. Sentence 5: After the party,i opened all my gifts and i love them all. Choices: a. birthday party. b. Auto Accident.
Output:
a