Taking out the trash - keyboard shortcut to empty the trash

Ok, this is trivial but how do you empty the trash using a keyboard shortcut?

command-shift-delete
empties the trash with prompt.

and if you're really sure:
command-shift-option-delete
empties the trash WITHOUT a prompt.

Note: A friendly warning, if you rely on this too much, it'll become a habit so beware! You might lose something you want.