Dedup in Excel

Hi there I have 2 spreadsheets
one lists in each row a category code i.e.
12345
On the other sheet I have a list of URLs which has a code in them i.e. www.example.com/products/12345
I need a list of the URLs from the second spreadsheet which dont have a corresponding code in the first spreadsheet.
Should not take more than 10-20 mins for some one who knows what they are doing.

Thanks