James:
Let's take this offline: contact me at . I'm a bit
proprietary about applications I've written- but in the spirit of good
Netizenship I'll run the application against your data. If you'd like
me to do this, send lists A and B as text files to me at
. I'll send the results list back to you as text (or
as zipped text, since the file can be large).

Let me know-
Dave O