The conversation between human and AI assistant.
[|Human|] List the first four main characters of Ann M. Martin's "The Baby-Sitters Club" books.
[|AI|] Kristy Thomas, Mary Anne Spier, Claudia Kishi, and Stacey McGill
[|Human|] 
List the first four main characters of Ann M. Martin's "The Baby-Sitters Club" books.