I want to download www.abcd.ab.cd/123.

1. All addresses must contain 123. If it does not, I do not
want to download it.
2. I do not want to download any files with extension xy
3. I do want to download all files with extension wz

How do I do it?
(I have tried everything)

HTTrack is instead deciding to download www.abcd.ab.cd as well.