regular expressions and substituting in variables. 
*	Re: regular expressions and substituting in variables. 
*	Re: regular expressions and substituting in variables. 
*	Re: Re: regular expressions and substituting in variables. 
*	Re: Re: regular expressions and substituting in variables. 
*	Re: Re: Re: regular expressions and substituting in variables. 
*	Re: Re: Re: Re: regular expressions and substituting in variables.