When put in order, the numbers are: $$3569$$, $$3596$$, $$3659$$, $$3695$$, $$3956$$, $$3965$$, $$5369$$, $$5396$$, $$5639$$, $$5693$$, $$\ldots $$ 
There are $$24$$ four-digit numbers which use each of the digits $$3$$, $$5$$, $$6$$ and $$9$$ once only.  When all of these $$24$$ four-digit numbers are put in order from smallest to largest, which one is in \emph{eighth} position? 

  * $$3569$$ 
  * $$5369$$ 
  * $$5396$$ 
  * $$5639$$ 
  * $$5936$$ 