Regular expression translation
[ac7]b[bc]
Translation: Match any 1 character in a set that is either a, c, or
7, then a b, then any 1 character that is in a set that is either b
or c.
Match example: abc
^…$
\<the\>
^[A-Z]..$
^[A-Z][ a-z]*3[0-5]
[a-z]*\.$
^ *[A-Z][a-z][a-z]$
^[A-Za-z]*[^,][A-Za-z]*$
[[:digit:]]{1,3}\.[[:digit:]]{1,3}\.[[:digit:]]{1,3}\.[[:digit:]]{1,3}
.*\([0-9][.][0-9]\)
[0-9]{3}-[0-9]{4}