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 realized he had just sat on a bench with wet paint. Sentence 2: His expensive suit had a stripe on it, minutes before the big meeting! Sentence 3: Sam thought for a moment, then acted. Sentence 4: He rolled around on the bench, creating more stripes. Sentence 5: The executives were impressed with his pinstripe suit. Choices: a. Missed Calls. b. Stripes.
b