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: The kids worked on a robot. Sentence 2: They learned programming. Sentence 3: They programmed the robot. Sentence 4: The robot said a short phrase. Sentence 5: People called it a success. Choices: a. Success. b. Smoking.
Output:
a