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: Frank has the biggest sweet tooth. Sentence 2: He was really craving some candy on Saturday. Sentence 3: He decided to go to a candy store. Sentence 4: Frank spent half an hour picking candy he wanted. Sentence 5: Frank ended up getting four cavities. Choices: a. Candy. b. Surprise Birthday Visit.

a