*matches any number of characters from the set below:
[:alnum:]an alphanumeric character [a-zA-Z0-9]
[:blank:]a whitespace character, excluding line breaks [ \t]
\\the literal \ (9210 / 1348 / 5C16)
\/the literal / (4710 / 578 / 2F16)
\.the literal . (4610 / 568 / 2E16)
_the literal _ (9510 / 1378 / 5F16)
-the literal - (4510 / 558 / 2D16)