If you are doing this in Excel (rather than Access), then try this formula.
=IF(LEN(A1)-LEN(SUBSTITUTE(A1," ",""))=0,A1,RIGHT(A1,LEN(A1)-FIND("*",SUBSTITUTE(A1," ","*",LEN(A1)-LEN(SUBSTITUTE(A1," ",""))))))
[Edited to note that the target cell is A1, and you can put this formula into B1. Adjust as necessary.]