?matches at most one character from the set below:
the literal (3210 / 408 / 2016)
\-the literal - (4510 / 558 / 2D16)
\/the literal / (4710 / 578 / 2F16)
\ethe escape character (ASCII 27)
\/the literal / (4710 / 578 / 2F16)
ethe literal e (10110 / 1458 / 6516) (case sensitive)