I have two files containing list of files. I need to check what files are missing in the list of second file. Problem is that I do not have to match full name, but only need to match last 19 Characters of the file names.

E.g 

MyFile123432**20150510230000.xlsx** 

and 

MyFile999996**20150510230000.xlsx**

are same files. 

This is a unique problem and I don't know how to start. Kindly help.