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: Marcus walked into the grocery store. Sentence 2: He went to the aisle with bread. Sentence 3: He grabbed a loaf and went to the cashier. Sentence 4: The cashier asked why he only bought bread. Sentence 5: He looked at her and said he was feeding pigeons. Choices: a. Lost bike. b. Pigeons.

b