user owner, are the only person that has read and write permissions to the files. The files will be located in a number of different directories that already contain other files you don't want modified.

How could you BEST create these files with the correct permissions using the LEAST amount of effort?

Make a list of all the files you created and run umask $0066$ on each of them to change their permissions.

Type umask $6600$ to change your umask

Run chmod $-$R $600$ on all of the directories in which you created the new files

Type umask $0066$ to change your umask