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: Sam really hated pickles. Sentence 2: His friend Todd, though, really liked to play practical jokes. Sentence 3: One day Todd made him a pb&j sandwich with a hidden pickle inside. Sentence 4: Sam took a big bite, then spat it out and gagged on the pickle. Sentence 5: Todd laughed and laughed and Sam's discomfort. Choices: a. Moving out. b. Pickle Surprise?.
b