Inventory Locations

I have set up locations with Aisles, Racks and Shelf's.

The Aisles are A though J.

The Racks are from 01 through 09.

The Shelfs are from 01 thorough 09.

So a location will look something like 'A.01.01' or 'A.02.02'.

I would prefer to use '-' rather then '.' so it looks like 'A-01-01' OR 'A-02-02'.

How do I change the period '.' to a dash '-'?

Thanks