List the first four main characters of Ann M. Martin's "The Baby-Sitters Club" books.
Kristy Thomas, Mary Anne Spier, Claudia Kishi, and Stacey McGill
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: List the first four main characters of Ann M. Martin's "The Baby-Sitters Club" books.
### Input: 
### Response: Kristy Thomas, Mary Anne Spier, Claudia Kishi, and Stacey McGill