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: Tommy was a young boy. Sentence 2: He had been a very good boy this year. Sentence 3: He asked Santa for a brand new bike for christmas. Sentence 4: Christmas morning comes and tommy runs down the stairs. Sentence 5: Tommy is so happy to see his brand new bike under the tree. Choices: a. Candy Factory. b. Tommy gets a bike.

b