For example:
_-_-_ would equal 10
or
_ _ _ _ _ would equal 0
Also if you wanted to send a message using words this method as well. 16 8 4 2 1
For example:
To say "hello" you would type
_-_ _ _
_ _-_-
_- -_ _
_- -_ _
_- - - -
Each set of symbols represents a letter and although it would take you a while to send a long message it does in fact work.