Regular Expressoin for first name after comma

i have this list of lines
Mohhamd,ali khaled  i need to return afer comma ali
Anzi,moh@@ee salem  i need to return after comma moh@@ee
Moha,salem i need to return salem

i  need to use regular expression pattern.

i have used this pattern ,\w+\s but it's not work for Anzi,moh@@ee salem   because there is a non-word character in this moh@@ee

see that @@ is not @@ exactly but it is an arabic character but the web site translated as @@.

Thanks