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: I decided to take karate lessons. Sentence 2: I first day was embarrassing. Sentence 3: I was tripped by three people. Sentence 4: I decided to practice very hard. Sentence 5: After a month, I was the best in the class. Choices: a. Karate Lessons. b. Bad turbulence.

a