You will be given a definition of a task first, then some input of the task.
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'.

Sentence 1: Susie broke her ankle and went to the orthopedic doctor. Sentence 2: The doctor gave her options for a new cast color for her ankle. Sentence 3: Susie chose pink, to compliment her outfit. Sentence 4: The doctor used a special saw to take the old cast off. Sentence 5: Then, the doctor put a new pink cast on Susie's ankle. Choices: a. Grass Isn't Always Greener. b. New Cast.
Output:
b