Sorting symbols alphabetically
 

I sometimes start an important action's name with a symbol (like ! or .) so it's at the top of a list if I sort it alphabetically.

I'm not sure what symbols, if any, would let me send an item to the bottom of a list when sorted alphabetically, but I'd like to know.

So my question is; in what order does OmniFocus (or should that be OS X?) sort it's characters ie. letters, number and symbols?

Thanks for reading.

The Apple symbol (alt-shift-k) sorts to the bottom.
A space sorts to the top.
I don't use others.