*matches any number of characters from the set below:
\)the literal ) (4110 / 518 / 2916)
\(-\/one character from ( (4010) to / (4710)
\.the literal . (4610 / 568 / 2E16)
xthe literal x (12010 / 1708 / 7816) (case insensitive)
the literal (3210 / 408 / 2016)