A E I O U will exist in the actual output, they will just be considered identical when it comes to checking name collisions. 
And considering some Names will have the -ium or the -ite Ending due to being āElementsā and āOresā, there is no way I could avoid them. Only H is truly blacklisted from the Alphabet, unless I seriously have to use it. (which I do not think would be the case)