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 lost his debit card one day. Sentence 2: When he realized he checked his banking activity. Sentence 3: Someone had been using it. Sentence 4: He called the bank and had it cancelled immediately. Sentence 5: They investigated and returned his money. Choices: a. Stolen Debit Card. b. The cell phone.

a