Need A Custom Script To Shorten URLs to My Specs

Hello, I need someone that can create me a script that can trim URLs to my specifications. For example, if I have a list of 1,000 URLs such as: [login to view URL] [login to view URL] [login to view URL] I want to be able to tell the script that I want to trim everything after the "/node/" section in the URL so I'm left with: [login to view URL] [login to view URL] [login to view URL] I also want to be able to tell the script to delete any URLs that contain certain characters that I choose. That way I can tell it to delete any URLs that contain the characters "/tag/", or whatever I specify.