What is the response of "Valar Morghulis"?

Note: This riddle is for "Game of Thrones" fan.

Valar Morghulis GOT Riddle

Valar Dohaeris

"Valar Dohaeris" is a phrase commonly used in Braavos, means "all men must die".
The common response of "Valar Dohaeris" is "Valar Dohaeris" means "all men must serve."