SUSAN GOES TO THE POST-OFFICE TO BUY FIVE STAMPS OF THE SAME DENOM...

9. Susan goes to the post-office to buy five stamps of the same denomination and she wants her stamps all connected in one piece. The post master takes out the last set of nine stamps available as shown below. In how many ways can the stamps be torn-off? (Stamps must be connected along an entire edge, not just at a vertex.)