First of all The used chip has only 1 hardware uart so HSERIN and HSEROUT without the 2 behind is normaly used.
Then you combine behind the HSEROUT the modifiers of the SEROUT command.
I can tell you ofcource what you had to type, but you will learn more by yourself if you read the exact used modifiers used for the HSEROUT (HSERIN) command and the SEROUT (SERIN) command and what is the difference beteween those two commands.
You can find it in the book that came with the compiler or you can download it by www.melabs.com