Given the task definition, example input & output, solve the new input case.
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'.
Example: Sentence 1: Marcus needed clothing for a business casual event. Sentence 2: All of his clothes were either too formal or too casual. Sentence 3: He decided to buy a pair of khakis. Sentence 4: The pair he bought fit him perfectly. Sentence 5: Marcus was happy to have the right clothes for the event. Choices: a. Marcus Buys Khakis. b. Marcus Works.
Output: a
Marcus's reasons for buying khakis is established, followed by his purchase of them and reaction.

New input case for you: Sentence 1: I haven't seen my sister for several years now. Sentence 2: Finally I saw her yesterday while visiting my mother. Sentence 3: She's been in a cult for the past five years and they never told me. Sentence 4: I asked my mom why they let my sister join a cult. Sentence 5: She told me she thought it would be good for her. Choices: a. It's A Cult. b. Cutting hair..
Output:
a