^	Beginning of line
$	End of line
.	Any character
<DEL>
\d	Decimal digit
\D	Non digit
\s	Whitespace character
\S	Non Whitespace character
\w	Alphanumeric character
\W	Non alphanumeric character
<DEL>
*	Zero or more matches
*?	Zero or more matches (non greedy)
+	One or more matches
+?	One or more matches (non greedy)
?	Zero or one match
??	Zero or one match (non greedy)