Crystal Reports problem with formula

Message

   Hello

I have a list of transaction report and I need to restrict transactions types for non-control accounts.

If an account is a control account then show all transactions types but if it is not a control account then show all transactions types except 13,14,18,19). I was thinkng about using select case but somthing is wrong in it, please help!

SELECT CASE {Command.Controlaccount}
CASE "Y"
FORMULA = {Command.TransType}
CASE "N"
FORMULA = ({Command.TransType} <> "13, 14, 18, 19")
END SELECT