The following may be filtered in the help file:

        U : Master User
        G : God
        D : Avatar (Demi-God)
        V : Advisor
        A : ArchWizard
        R : Prophet
        W : Full Wizard (Non Emeriti)
        X : Apprentice - Emeriti

        L : Level Checking
        P : PFlag Checking
        M : Mask Checking
        E : EFlag Checking
        ! : Negative Return