EWCG 8. decrypting a message

Hi,
I am having trouble decoding this sample.
My questions are:
On this page, 
6.  YPX   where does this come from?
7.  FZQ   where does this come from?
8.  TMK   where does this come from?
I realize these three things are the first trigram, second trigram and the message key....
My problem is they are not on the page.
Also, the message is not on the page.

Any help would be most appreciated as I am confused.


thanks,
claude

I am no longer confused and can go forth with vigor.   No responses needed.

Claude