How to set permissions so that users can only do things in all subdirectories but not the parent one.

For example, if I have the following directory structure:

-Hello World
--1
--2
--3

I want users only to do things(upload delete browse rename etc) in the subdirectories '1 2 3'. But not in the 'Hello World'.

I know that I can really do it if I set permissions for these three directories individually.

However, what I want is if I create another directories called '4'. It should automatically have the permissions without going to the profiles and add '4' into the list.

Any suggestions?

I have tried : 'root/hello_world' unchecked for subdirectories and permissions
and 'root/hello_world' checked for subdirectories and permissions

But after I saved it, it will apply the first row and ignore the second and same thing happened if i swap two rows.