Please help with this problem.

use the coding matrix A = 1 -1 0 and its inverse A^-1 = 0 1 2 to write a cryptogram for

3 0 2 -1 1 2

-1 0 -1 0 -1 -3

the message.

S T A Y _ W E L L

19 20 1 25 0 23 5 12 12

Use 19 25 5

20 0 12

1 23 12