Does anyone know what Skydoesminecraft server ranks are?

Hey my sister plays on Sky's server ALOT and she is dying to know what are the ranks for it for some reason I say to her why do you even need to know and she says I just wanna know shes been bothering me a lot she thinks I know it because I play minecraft more then her I say I don't know it but she still bothers me please this girl is annoying please someone tell me the ranks