Given the task definition and input, reply with output. 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: My brother and I had plastic Easter Eggs. Sentence 2: We decorated them. Sentence 3: We pretended they were alive. Sentence 4: One of them got lost. Sentence 5: We said it had to go fight a battle. Choices: a. Easter Eggs. b. Cooking Mistake.
a