Heya, I was going to take some time during lunch today and get a perl app for you, but it occurs to me that I would basically be writing a scaled down version of a utility called "grep" .

You can find a version of it somewhere and if you have a text file containing the words you want to search through, you can get what you want.

For example, suppose your dictionary is called "dict.txt"

Then you might look for matches to your word above using something like:

grep "[bh]i[fp]" dict.txt

Here's the wiki page on grep - there are some tutorials on how to use it at the bottom of the page.

http://en.wikipedia.org/wiki/Grep

This is a Unix utility, but you can find versions available for Windows.

Here's a GNU library port to windows:
http://unxutils.sourceforge.net/

It contains a lot of other useful utilities.

You just need a word list (dictionary).