Regular Expression

[Angel]

Hi,
I want to validate an entry in a textbox. I want to use
RegularEpressionValidator to check if
entered string is one of the following grade marks.
A+, A, B+, B, C+, C, **
Is it possible to do that and if so can someone please give an example.
Thanks
Angel

 

[anony]

[AaBbCc][+-]?|\*{2,2}