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: Tom was signing papers at work. Sentence 2: His pen ran out of ink. Sentence 3: Tom didn't have any spares around. Sentence 4: He decided to ask a coworker to borrow one. Sentence 5: The co-worker happily obliged. Choices: a. First Word. b. Out of Ink.

b