Using this key, decode the following message
| A - 6 | B - 12 | C - 9 | E - 8 | |
| H - 2 | I - 10 | K - 4 | O - 7 | P - 3 |
| R - 5 | S - 1 | T - 11 | U - 13 |
__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ ! 7 13 5 3 6 9 4 10 1 11 2 8 12 8 1 11